diff --git a/crates/distribution-types/src/resolution.rs b/crates/distribution-types/src/resolution.rs
index a7bd4092c..fdbcf7f13 100644
--- a/crates/distribution-types/src/resolution.rs
+++ b/crates/distribution-types/src/resolution.rs
@@ -83,7 +83,7 @@ impl From<Dist> for Requirement {
                     ),
                 )),
                 marker: None,
-                source: None,
+                path: None,
             },
 
             Dist::Built(BuiltDist::DirectUrl(wheel)) => Self {
@@ -91,14 +91,14 @@ impl From<Dist> for Requirement {
                 extras: vec![],
                 version_or_url: Some(pep508_rs::VersionOrUrl::Url(wheel.url)),
                 marker: None,
-                source: None,
+                path: None,
             },
             Dist::Built(BuiltDist::Path(wheel)) => Self {
                 name: wheel.filename.name,
                 extras: vec![],
                 version_or_url: Some(pep508_rs::VersionOrUrl::Url(wheel.url)),
                 marker: None,
-                source: None,
+                path: None,
             },
             Dist::Source(SourceDist::Registry(sdist)) => Self {
                 name: sdist.filename.name,
@@ -109,28 +109,28 @@ impl From<Dist> for Requirement {
                     ),
                 )),
                 marker: None,
-                source: None,
+                path: None,
             },
             Dist::Source(SourceDist::DirectUrl(sdist)) => Self {
                 name: sdist.name,
                 extras: vec![],
                 version_or_url: Some(pep508_rs::VersionOrUrl::Url(sdist.url)),
                 marker: None,
-                source: None,
+                path: None,
             },
             Dist::Source(SourceDist::Git(sdist)) => Self {
                 name: sdist.name,
                 extras: vec![],
                 version_or_url: Some(pep508_rs::VersionOrUrl::Url(sdist.url)),
                 marker: None,
-                source: None,
+                path: None,
             },
             Dist::Source(SourceDist::Path(sdist)) => Self {
                 name: sdist.name,
                 extras: vec![],
                 version_or_url: Some(pep508_rs::VersionOrUrl::Url(sdist.url)),
                 marker: None,
-                source: None,
+                path: None,
             },
         }
     }
@@ -147,7 +147,7 @@ impl From<InstalledDist> for Requirement {
                 )),
             )),
             marker: None,
-            source: None,
+            path: None,
         }
     }
 }
diff --git a/crates/pep508-rs/src/lib.rs b/crates/pep508-rs/src/lib.rs
index aa8927043..3fc7424b6 100644
--- a/crates/pep508-rs/src/lib.rs
+++ b/crates/pep508-rs/src/lib.rs
@@ -43,7 +43,6 @@ pub use marker::{
 };
 use pep440_rs::{TrackedFromStr, Version, VersionSpecifier, VersionSpecifiers};
 use uv_fs::normalize_url_path;
-use uv_normalize::Source;
 // Parity with the crates.io version of pep508_rs
 use crate::verbatim_url::VerbatimUrlError;
 #[cfg(feature = "non-pep508-extensions")]
@@ -146,7 +145,7 @@ pub struct Requirement {
     /// Those are a nested and/or tree.
     pub marker: Option<MarkerTree>,
     /// Source of the original file (where existing)
-    pub source: Option<Source>,
+    pub path: Option<String>,
 }
 
 impl Display for Requirement {
@@ -1317,7 +1316,7 @@ fn parse_pep508_requirement(
         extras,
         version_or_url: requirement_kind,
         marker,
-        source: source.map(|p| Source::Requirement(p.to_string_lossy().to_string())),
+        path: source.map(|p| p.to_string_lossy().to_string()),
     })
 }
 
@@ -1518,7 +1517,7 @@ mod tests {
                 operator: MarkerOperator::LessThan,
                 r_value: MarkerValue::QuotedString("2.7".to_string()),
             })),
-            source: None,
+            path: None,
         };
         assert_eq!(requests, expected);
     }
@@ -1742,7 +1741,7 @@ mod tests {
             extras: vec![],
             marker: None,
             version_or_url: Some(VersionOrUrl::Url(VerbatimUrl::from_str(url).unwrap())),
-            source: None,
+            path: None,
         };
         assert_eq!(pip_url, expected);
     }
diff --git a/crates/requirements-txt/src/lib.rs b/crates/requirements-txt/src/lib.rs
index 063dfe3d2..37554a7d4 100644
--- a/crates/requirements-txt/src/lib.rs
+++ b/crates/requirements-txt/src/lib.rs
@@ -55,7 +55,7 @@ use uv_client::BaseClient;
 use uv_client::BaseClientBuilder;
 use uv_configuration::{NoBinary, NoBuild, PackageNameSpecifier};
 use uv_fs::{normalize_url_path, Simplified};
-use uv_normalize::{ExtraName, Source};
+use uv_normalize::ExtraName;
 use uv_warnings::warn_user;
 
 mod requirement;
@@ -495,10 +495,7 @@ impl RequirementsTxt {
                     // _requirements_, but we don't want to support that.
                     for entry in sub_constraints.requirements {
                         match entry.requirement {
-                            RequirementsTxtRequirement::Pep508(mut requirement) => {
-                                if let Some(Source::Requirement(ref name)) = requirement.source {
-                                    requirement.source.replace(Source::Constraint(name.clone()));
-                                }
+                            RequirementsTxtRequirement::Pep508(requirement) => {
                                 data.constraints.push(requirement);
                             }
                             RequirementsTxtRequirement::Unnamed(_) => {
@@ -509,10 +506,7 @@ impl RequirementsTxt {
                             }
                         }
                     }
-                    for mut constraint in sub_constraints.constraints {
-                        if let Some(Source::Requirement(ref name)) = constraint.source {
-                            constraint.source.replace(Source::Constraint(name.clone()));
-                        }
+                    for constraint in sub_constraints.constraints {
                         data.constraints.push(constraint);
                     }
                 }
diff --git a/crates/uv-configuration/src/constraints.rs b/crates/uv-configuration/src/constraints.rs
index 117eb6402..49e4a0f5d 100644
--- a/crates/uv-configuration/src/constraints.rs
+++ b/crates/uv-configuration/src/constraints.rs
@@ -3,7 +3,7 @@ use std::hash::BuildHasherDefault;
 use rustc_hash::FxHashMap;
 
 use pep508_rs::Requirement;
-use uv_normalize::{PackageName, Source};
+use uv_normalize::PackageName;
 
 /// A set of constraints for a set of requirements.
 #[derive(Debug, Default, Clone)]
@@ -14,10 +14,7 @@ impl Constraints {
     pub fn from_requirements(requirements: Vec<Requirement>) -> Self {
         let mut constraints: FxHashMap<PackageName, Vec<Requirement>> =
             FxHashMap::with_capacity_and_hasher(requirements.len(), BuildHasherDefault::default());
-        for mut requirement in requirements {
-            if let Some(Source::Requirement(ref name)) = requirement.source {
-                requirement.source.replace(Source::Constraint(name.clone()));
-            }
+        for requirement in requirements {
             constraints
                 .entry(requirement.name.clone())
                 .or_default()
diff --git a/crates/uv-dev/src/resolve_many.rs b/crates/uv-dev/src/resolve_many.rs
index 0eed3031d..ae25fe186 100644
--- a/crates/uv-dev/src/resolve_many.rs
+++ b/crates/uv-dev/src/resolve_many.rs
@@ -132,7 +132,7 @@ pub(crate) async fn resolve_many(args: ResolveManyArgs) -> Result<()> {
                             extras: requirement.extras,
                             version_or_url: Some(equals_version),
                             marker: None,
-                            source: requirement.source,
+                            path: requirement.path,
                         }
                     } else {
                         requirement
diff --git a/crates/uv-installer/src/site_packages.rs b/crates/uv-installer/src/site_packages.rs
index 3ac0dab9f..f3cfa2f5b 100644
--- a/crates/uv-installer/src/site_packages.rs
+++ b/crates/uv-installer/src/site_packages.rs
@@ -128,7 +128,7 @@ impl<'a> SitePackages<'a> {
                 }
             }),
             marker: None,
-            source: None,
+            path: None,
         })
     }
 
diff --git a/crates/uv-requirements/src/unnamed.rs b/crates/uv-requirements/src/unnamed.rs
index a64e9e257..4f21545c4 100644
--- a/crates/uv-requirements/src/unnamed.rs
+++ b/crates/uv-requirements/src/unnamed.rs
@@ -102,7 +102,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                 extras: requirement.extras,
                 version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                 marker: requirement.marker,
-                source: None,
+                path: None,
             });
         }
 
@@ -121,7 +121,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                 extras: requirement.extras,
                 version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                 marker: requirement.marker,
-                source: None,
+                path: None,
             });
         }
 
@@ -149,7 +149,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                             extras: requirement.extras,
                             version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                             marker: requirement.marker,
-                            source: None,
+                            path: None,
                         });
                     }
 
@@ -170,7 +170,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                                 extras: requirement.extras,
                                 version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                                 marker: requirement.marker,
-                                source: None,
+                                path: None,
                             });
                         }
 
@@ -188,7 +188,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                                         extras: requirement.extras,
                                         version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                                         marker: requirement.marker,
-                                        source: None,
+                                        path: None,
                                     });
                                 }
                             }
@@ -217,7 +217,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
                                         extras: requirement.extras,
                                         version_or_url: Some(VersionOrUrl::Url(requirement.url)),
                                         marker: requirement.marker,
-                                        source: None,
+                                        path: None,
                                     });
                                 }
                             }
@@ -276,7 +276,7 @@ impl<'a, Context: BuildContext + Send + Sync> NamedRequirementsResolver<'a, Cont
             extras: requirement.extras,
             version_or_url: Some(VersionOrUrl::Url(requirement.url)),
             marker: requirement.marker,
-            source: None,
+            path: None,
         })
     }
 }
diff --git a/crates/uv-resolver/src/error.rs b/crates/uv-resolver/src/error.rs
index 7dd1925e7..6bc327f78 100644
--- a/crates/uv-resolver/src/error.rs
+++ b/crates/uv-resolver/src/error.rs
@@ -251,7 +251,7 @@ impl NoSolutionError {
                     );
                 }
                 PubGrubPackage::Extra(_, _, _) => {}
-                PubGrubPackage::Package(name, _, _, _) => {
+                PubGrubPackage::Package(name, _, _) => {
                     // Avoid including available versions for packages that exist in the derivation
                     // tree, but were never visited during resolution. We _may_ have metadata for
                     // these packages, but it's non-deterministic, and omitting them ensures that
@@ -299,7 +299,7 @@ impl NoSolutionError {
     ) -> Self {
         let mut new = FxHashMap::default();
         for package in self.derivation_tree.packages() {
-            if let PubGrubPackage::Package(name, _, _, _) = package {
+            if let PubGrubPackage::Package(name, _, _) = package {
                 if let Some(entry) = unavailable_packages.get(name) {
                     let reason = entry.value();
                     new.insert(name.clone(), reason.clone());
@@ -318,7 +318,7 @@ impl NoSolutionError {
     ) -> Self {
         let mut new = FxHashMap::default();
         for package in self.derivation_tree.packages() {
-            if let PubGrubPackage::Package(name, _, _, _) = package {
+            if let PubGrubPackage::Package(name, _, _) = package {
                 if let Some(entry) = incomplete_packages.get(name) {
                     let versions = entry.value();
                     for entry in versions {
diff --git a/crates/uv-resolver/src/pubgrub/dependencies.rs b/crates/uv-resolver/src/pubgrub/dependencies.rs
index 65b4f5a9c..ea39304dd 100644
--- a/crates/uv-resolver/src/pubgrub/dependencies.rs
+++ b/crates/uv-resolver/src/pubgrub/dependencies.rs
@@ -188,16 +188,7 @@ fn to_pubgrub(
     match requirement.version_or_url.as_ref() {
         // The requirement has no specifier (e.g., `flask`).
         None => Ok((
-            PubGrubPackage::from_package(
-                requirement.name.clone(),
-                extra,
-                requirement
-                    .source
-                    .as_ref()
-                    .map(|s| vec![s.clone()])
-                    .unwrap_or_default(),
-                urls,
-            ),
+            PubGrubPackage::from_package(requirement.name.clone(), extra, urls),
             Range::full(),
         )),
 
@@ -226,16 +217,7 @@ fn to_pubgrub(
             };
 
             Ok((
-                PubGrubPackage::from_package(
-                    requirement.name.clone(),
-                    extra,
-                    requirement
-                        .source
-                        .as_ref()
-                        .map(|s| vec![s.clone()])
-                        .unwrap_or_default(),
-                    urls,
-                ),
+                PubGrubPackage::from_package(requirement.name.clone(), extra, urls),
                 version,
             ))
         }
@@ -258,16 +240,7 @@ fn to_pubgrub(
             }
 
             Ok((
-                PubGrubPackage::Package(
-                    requirement.name.clone(),
-                    extra,
-                    Some(expected.clone()),
-                    requirement
-                        .source
-                        .as_ref()
-                        .map(|s| vec![s.clone()])
-                        .unwrap_or_default(),
-                ),
+                PubGrubPackage::Package(requirement.name.clone(), extra, Some(expected.clone())),
                 Range::full(),
             ))
         }
diff --git a/crates/uv-resolver/src/pubgrub/package.rs b/crates/uv-resolver/src/pubgrub/package.rs
index 6cde1d8f7..6431432b4 100644
--- a/crates/uv-resolver/src/pubgrub/package.rs
+++ b/crates/uv-resolver/src/pubgrub/package.rs
@@ -1,7 +1,7 @@
 use derivative::Derivative;
 use pep508_rs::VerbatimUrl;
 use std::hash::Hash;
-use uv_normalize::{ExtraName, PackageName, Source};
+use uv_normalize::{ExtraName, PackageName};
 
 use crate::resolver::Urls;
 
@@ -13,6 +13,7 @@ use crate::resolver::Urls;
 ///    package (e.g., `black[colorama]`), and mark it as a dependency of the real package (e.g.,
 ///    `black`). We then discard the virtual packages at the end of the resolution process.
 #[derive(Debug, Clone, Eq, Derivative)]
+#[derivative(PartialEq, Hash)]
 pub enum PubGrubPackage {
     /// The root package, which is used to start the resolution process.
     Root(Option<PackageName>),
@@ -59,9 +60,6 @@ pub enum PubGrubPackage {
         /// version before the registry version. So we could just error if we visit a URL variant
         /// _after_ a registry variant.
         Option<VerbatimUrl>,
-        /// Names of the file sources of this package (e.g. requirements.in), or empty for dependencies
-        /// only from other libraries
-        Vec<Source>,
     ),
     /// A proxy package to represent a dependency with an extra (e.g., `black[colorama]`).
     ///
@@ -81,79 +79,12 @@ pub enum PubGrubPackage {
 
 impl PubGrubPackage {
     /// Create a [`PubGrubPackage`] from a package name and optional extra name.
-    pub(crate) fn from_package(
-        name: PackageName,
-        extra: Option<ExtraName>,
-        source: Vec<Source>,
-        urls: &Urls,
-    ) -> Self {
+    pub(crate) fn from_package(name: PackageName, extra: Option<ExtraName>, urls: &Urls) -> Self {
         let url = urls.get(&name).cloned();
         if let Some(extra) = extra {
             Self::Extra(name, extra, url)
         } else {
-            Self::Package(name, extra, url, source)
-        }
-    }
-}
-
-// Not using the default implementation, because otherwise two deps with different sources
-// are treated as two things
-impl Hash for PubGrubPackage {
-    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-        match self {
-            PubGrubPackage::Root(name) => {
-                "Root".hash(state);
-                name.hash(state);
-            }
-            PubGrubPackage::Python(version) => {
-                "Python".hash(state);
-                version.hash(state);
-            }
-            PubGrubPackage::Package(name, extra, url, _source) => {
-                "Package".hash(state);
-                name.hash(state);
-                extra.hash(state);
-                url.hash(state);
-            }
-            PubGrubPackage::Extra(name, extra, url) => {
-                "Extra".hash(state);
-                name.hash(state);
-                extra.hash(state);
-                url.hash(state);
-            }
-        }
-    }
-}
-
-impl PartialEq for PubGrubPackage {
-    fn eq(&self, other: &Self) -> bool {
-        match self {
-            PubGrubPackage::Root(name) => {
-                if let PubGrubPackage::Root(other_name) = other {
-                    return other_name == name;
-                }
-                false
-            }
-            PubGrubPackage::Python(version) => {
-                if let PubGrubPackage::Python(other_version) = other {
-                    return other_version == version;
-                }
-                false
-            }
-            PubGrubPackage::Package(name, extra, url, _source) => {
-                if let PubGrubPackage::Package(other_name, other_extra, other_url, _other_source) =
-                    other
-                {
-                    return other_name == name && other_extra == extra && other_url == url;
-                }
-                false
-            }
-            PubGrubPackage::Extra(name, extra, url) => {
-                if let PubGrubPackage::Extra(other_name, other_extra, other_url) = other {
-                    return other_name == name && other_extra == extra && other_url == url;
-                }
-                false
-            }
+            Self::Package(name, extra, url)
         }
     }
 }
diff --git a/crates/uv-resolver/src/pubgrub/priority.rs b/crates/uv-resolver/src/pubgrub/priority.rs
index 153406891..388e35a27 100644
--- a/crates/uv-resolver/src/pubgrub/priority.rs
+++ b/crates/uv-resolver/src/pubgrub/priority.rs
@@ -28,7 +28,7 @@ impl PubGrubPriorities {
             PubGrubPackage::Root(_) => {}
             PubGrubPackage::Python(_) => {}
 
-            PubGrubPackage::Extra(name, _, None) | PubGrubPackage::Package(name, _, None, _) => {
+            PubGrubPackage::Extra(name, _, None) | PubGrubPackage::Package(name, _, None) => {
                 match self.0.entry(name.clone()) {
                     std::collections::hash_map::Entry::Occupied(mut entry) => {
                         // Preserve the original index.
@@ -61,8 +61,7 @@ impl PubGrubPriorities {
                     }
                 }
             }
-            PubGrubPackage::Extra(name, _, Some(_))
-            | PubGrubPackage::Package(name, _, Some(_), _) => {
+            PubGrubPackage::Extra(name, _, Some(_)) | PubGrubPackage::Package(name, _, Some(_)) => {
                 match self.0.entry(name.clone()) {
                     std::collections::hash_map::Entry::Occupied(mut entry) => {
                         // Preserve the original index.
@@ -96,7 +95,7 @@ impl PubGrubPriorities {
             PubGrubPackage::Root(_) => Some(PubGrubPriority::Root),
             PubGrubPackage::Python(_) => Some(PubGrubPriority::Root),
             PubGrubPackage::Extra(name, _, _) => self.0.get(name).copied(),
-            PubGrubPackage::Package(name, _, _, _) => self.0.get(name).copied(),
+            PubGrubPackage::Package(name, _, _) => self.0.get(name).copied(),
         }
     }
 }
diff --git a/crates/uv-resolver/src/resolution.rs b/crates/uv-resolver/src/resolution.rs
index 679b965d5..b31e6a6a1 100644
--- a/crates/uv-resolver/src/resolution.rs
+++ b/crates/uv-resolver/src/resolution.rs
@@ -64,8 +64,6 @@ pub struct ResolutionGraph {
     editables: Editables,
     /// Any diagnostics that were encountered while building the graph.
     diagnostics: Vec<Diagnostic>,
-    /// Source files for dependencies
-    sources: FxHashMap<PackageName, Vec<Source>>,
 }
 
 impl ResolutionGraph {
@@ -87,24 +85,13 @@ impl ResolutionGraph {
             FxHashMap::with_capacity_and_hasher(selection.len(), BuildHasherDefault::default());
         let mut extras = FxHashMap::default();
         let mut diagnostics = Vec::new();
-        let mut sources: FxHashMap<PackageName, Vec<Source>> = FxHashMap::default();
-
-        let mut insert_source = |package_name: &PackageName, source_names: &Vec<Source>| {
-            for source_name in source_names {
-                if let Some(source_packages) = sources.get_mut(package_name) {
-                    source_packages.push(source_name.clone());
-                } else {
-                    sources.insert(package_name.clone(), vec![source_name.clone()]);
-                }
-            }
-        };
 
         // Add every package to the graph.
         let mut inverse =
             FxHashMap::with_capacity_and_hasher(selection.len(), BuildHasherDefault::default());
         for (package, version) in selection {
             match package {
-                PubGrubPackage::Package(package_name, None, None, source) => {
+                PubGrubPackage::Package(package_name, None, None) => {
                     // Create the distribution.
                     let pinned_package = if let Some((editable, _)) = editables.get(package_name) {
                         Dist::from_editable(package_name.clone(), editable.clone())?.into()
@@ -136,10 +123,8 @@ impl ResolutionGraph {
                     // Add the distribution to the graph.
                     let index = petgraph.add_node(pinned_package);
                     inverse.insert(package_name, index);
-
-                    insert_source(package_name, source);
                 }
-                PubGrubPackage::Package(package_name, None, Some(url), source) => {
+                PubGrubPackage::Package(package_name, None, Some(url)) => {
                     // Create the distribution.
                     let pinned_package = if let Some((editable, _)) = editables.get(package_name) {
                         Dist::from_editable(package_name.clone(), editable.clone())?
@@ -169,9 +154,8 @@ impl ResolutionGraph {
                     // Add the distribution to the graph.
                     let index = petgraph.add_node(pinned_package.into());
                     inverse.insert(package_name, index);
-                    insert_source(package_name, source);
                 }
-                PubGrubPackage::Package(package_name, Some(extra), None, _) => {
+                PubGrubPackage::Package(package_name, Some(extra), None) => {
                     // Validate that the `extra` exists.
                     let dist = PubGrubDistribution::from_registry(package_name, version);
 
@@ -225,7 +209,7 @@ impl ResolutionGraph {
                         }
                     }
                 }
-                PubGrubPackage::Package(package_name, Some(extra), Some(url), _) => {
+                PubGrubPackage::Package(package_name, Some(extra), Some(url)) => {
                     // Validate that the `extra` exists.
                     let dist = PubGrubDistribution::from_url(package_name, url);
 
@@ -300,10 +284,10 @@ impl ResolutionGraph {
                         continue;
                     }
 
-                    let PubGrubPackage::Package(self_package, _, _, _) = self_package else {
+                    let PubGrubPackage::Package(self_package, _, _) = self_package else {
                         continue;
                     };
-                    let PubGrubPackage::Package(dependency_package, _, _, _) = dependency_package
+                    let PubGrubPackage::Package(dependency_package, _, _) = dependency_package
                     else {
                         continue;
                     };
@@ -332,7 +316,6 @@ impl ResolutionGraph {
             extras,
             editables,
             diagnostics,
-            sources,
         })
     }
 
@@ -539,12 +522,15 @@ pub struct DisplayResolutionGraph<'a> {
     /// The style of annotation comments, used to indicate the dependencies that requested each
     /// package.
     annotation_style: AnnotationStyle,
+
+    sources: FxHashMap<PackageName, Vec<Source>>,
 }
 
 impl<'a> From<&'a ResolutionGraph> for DisplayResolutionGraph<'a> {
     fn from(resolution: &'a ResolutionGraph) -> Self {
         Self::new(
             resolution,
+            FxHashMap::default(),
             &[],
             false,
             false,
@@ -560,6 +546,7 @@ impl<'a> DisplayResolutionGraph<'a> {
     #[allow(clippy::fn_params_excessive_bools)]
     pub fn new(
         underlying: &'a ResolutionGraph,
+        sources: FxHashMap<PackageName, Vec<Source>>,
         no_emit_packages: &'a [PackageName],
         show_hashes: bool,
         include_extras: bool,
@@ -575,6 +562,7 @@ impl<'a> DisplayResolutionGraph<'a> {
             include_annotations,
             include_index_annotation,
             annotation_style,
+            sources,
         }
     }
 }
@@ -714,12 +702,7 @@ impl std::fmt::Display for DisplayResolutionGraph<'_> {
                     .map(|edge| &self.resolution.petgraph[edge.source()])
                     .collect::<Vec<_>>();
                 edges.sort_unstable_by_key(|package| package.name());
-                let source = self
-                    .resolution
-                    .sources
-                    .get(node.name())
-                    .cloned()
-                    .unwrap_or(vec![]);
+                let source = self.sources.get(node.name()).cloned().unwrap_or(vec![]);
 
                 match self.annotation_style {
                     AnnotationStyle::Line => {
diff --git a/crates/uv-resolver/src/resolver/batch_prefetch.rs b/crates/uv-resolver/src/resolver/batch_prefetch.rs
index 799e40930..deaeccd91 100644
--- a/crates/uv-resolver/src/resolver/batch_prefetch.rs
+++ b/crates/uv-resolver/src/resolver/batch_prefetch.rs
@@ -53,7 +53,7 @@ impl BatchPrefetcher {
         index: &InMemoryIndex,
         selector: &CandidateSelector,
     ) -> anyhow::Result<(), ResolveError> {
-        let PubGrubPackage::Package(package_name, None, None, _source) = &next else {
+        let PubGrubPackage::Package(package_name, None, None) = &next else {
             return Ok(());
         };
 
@@ -160,7 +160,7 @@ impl BatchPrefetcher {
     /// Each time we tried a version for a package, we register that here.
     pub(crate) fn version_tried(&mut self, package: PubGrubPackage) {
         // Only track base packages, no virtual packages from extras.
-        if matches!(package, PubGrubPackage::Package(_, Some(_), _, _)) {
+        if matches!(package, PubGrubPackage::Package(_, Some(_), _)) {
             return;
         }
         *self.tried_versions.entry(package).or_default() += 1;
diff --git a/crates/uv-resolver/src/resolver/mod.rs b/crates/uv-resolver/src/resolver/mod.rs
index 1c4c16322..fc5055d3e 100644
--- a/crates/uv-resolver/src/resolver/mod.rs
+++ b/crates/uv-resolver/src/resolver/mod.rs
@@ -364,7 +364,7 @@ impl<
                         .expect("a package was chosen but we don't have a term.");
 
                     let reason = {
-                        if let PubGrubPackage::Package(ref package_name, _, _, _) = next {
+                        if let PubGrubPackage::Package(ref package_name, _, _) = next {
                             // Check if the decision was due to the package being unavailable
                             self.unavailable_packages
                                 .get(package_name)
@@ -526,7 +526,7 @@ impl<
             PubGrubPackage::Root(_) => {}
             PubGrubPackage::Python(_) => {}
             PubGrubPackage::Extra(_, _, _) => {}
-            PubGrubPackage::Package(name, _extra, None, _) => {
+            PubGrubPackage::Package(name, _extra, None) => {
                 // Verify that the package is allowed under the hash-checking policy.
                 if !self.hasher.allows_package(name) {
                     return Err(ResolveError::UnhashedPackage(name.clone()));
@@ -537,7 +537,7 @@ impl<
                     request_sink.send(Request::Package(name.clone())).await?;
                 }
             }
-            PubGrubPackage::Package(name, _extra, Some(url), _) => {
+            PubGrubPackage::Package(name, _extra, Some(url)) => {
                 // Verify that the package is allowed under the hash-checking policy.
                 if !self.hasher.allows_url(url) {
                     return Err(ResolveError::UnhashedPackage(name.clone()));
@@ -562,7 +562,7 @@ impl<
         // Iterate over the potential packages, and fetch file metadata for any of them. These
         // represent our current best guesses for the versions that we _might_ select.
         for (package, range) in packages {
-            let PubGrubPackage::Package(package_name, None, None, _) = package else {
+            let PubGrubPackage::Package(package_name, None, None) = package else {
                 continue;
             };
             request_sink
@@ -606,7 +606,7 @@ impl<
             }
 
             PubGrubPackage::Extra(package_name, _, Some(url))
-            | PubGrubPackage::Package(package_name, _, Some(url), _) => {
+            | PubGrubPackage::Package(package_name, _, Some(url)) => {
                 debug!("Searching for a compatible version of {package} @ {url} ({range})");
 
                 // If the dist is an editable, return the version from the editable metadata.
@@ -697,7 +697,7 @@ impl<
             }
 
             PubGrubPackage::Extra(package_name, _, None)
-            | PubGrubPackage::Package(package_name, _, None, _) => {
+            | PubGrubPackage::Package(package_name, _, None) => {
                 // Wait for the metadata to be available.
                 let versions_response = self
                     .index
@@ -774,7 +774,7 @@ impl<
                 let version = candidate.version().clone();
 
                 // Emit a request to fetch the metadata for this version.
-                if matches!(package, PubGrubPackage::Package(_, _, _, _)) {
+                if matches!(package, PubGrubPackage::Package(_, _, _)) {
                     if self.index.distributions.register(candidate.version_id()) {
                         let request = match dist.for_resolution() {
                             ResolvedDistRef::Installable(dist) => Request::Dist(dist.clone()),
@@ -831,12 +831,8 @@ impl<
 
                 // Add a dependency on each editable.
                 for (editable, metadata) in self.editables.iter() {
-                    let package = PubGrubPackage::from_package(
-                        metadata.name.clone(),
-                        None,
-                        vec![],
-                        &self.urls,
-                    );
+                    let package =
+                        PubGrubPackage::from_package(metadata.name.clone(), None, &self.urls);
                     let version = Range::singleton(metadata.version.clone());
 
                     // Update the package priorities.
@@ -851,7 +847,6 @@ impl<
                             PubGrubPackage::from_package(
                                 metadata.name.clone(),
                                 Some(extra.clone()),
-                                vec![],
                                 &self.urls,
                             ),
                             Range::singleton(metadata.version.clone()),
@@ -864,7 +859,7 @@ impl<
 
             PubGrubPackage::Python(_) => Ok(Dependencies::Available(Vec::default())),
 
-            PubGrubPackage::Package(package_name, extra, url, _source) => {
+            PubGrubPackage::Package(package_name, extra, url) => {
                 // If we're excluding transitive dependencies, short-circuit.
                 if self.dependency_mode.is_direct() {
                     // If an extra is provided, wait for the metadata to be available, since it's
@@ -1027,16 +1022,11 @@ impl<
             // Add a dependency on both the extra and base package.
             PubGrubPackage::Extra(package_name, extra, url) => Ok(Dependencies::Available(vec![
                 (
-                    PubGrubPackage::Package(package_name.clone(), None, url.clone(), vec![]),
+                    PubGrubPackage::Package(package_name.clone(), None, url.clone()),
                     Range::singleton(version.clone()),
                 ),
                 (
-                    PubGrubPackage::Package(
-                        package_name.clone(),
-                        Some(extra.clone()),
-                        url.clone(),
-                        vec![],
-                    ),
+                    PubGrubPackage::Package(package_name.clone(), Some(extra.clone()), url.clone()),
                     Range::singleton(version.clone()),
                 ),
             ])),
@@ -1254,10 +1244,10 @@ impl<
                 PubGrubPackage::Root(_) => {}
                 PubGrubPackage::Python(_) => {}
                 PubGrubPackage::Extra(_, _, _) => {}
-                PubGrubPackage::Package(package_name, _extra, Some(url), _) => {
+                PubGrubPackage::Package(package_name, _extra, Some(url)) => {
                     reporter.on_progress(package_name, &VersionOrUrl::Url(url));
                 }
-                PubGrubPackage::Package(package_name, _extra, None, _source) => {
+                PubGrubPackage::Package(package_name, _extra, None) => {
                     reporter.on_progress(package_name, &VersionOrUrl::Version(version));
                 }
             }
diff --git a/crates/uv/src/commands/pip_compile.rs b/crates/uv/src/commands/pip_compile.rs
index bd0f0435b..d16eecc86 100644
--- a/crates/uv/src/commands/pip_compile.rs
+++ b/crates/uv/src/commands/pip_compile.rs
@@ -10,6 +10,7 @@ use anstream::{eprint, AutoStream, StripStream};
 use anyhow::{anyhow, Context, Result};
 use itertools::Itertools;
 use owo_colors::OwoColorize;
+use rustc_hash::FxHashMap;
 use tempfile::tempdir_in;
 use tracing::debug;
 
@@ -29,7 +30,7 @@ use uv_dispatch::BuildDispatch;
 use uv_fs::Simplified;
 use uv_installer::Downloader;
 use uv_interpreter::{find_best_python, find_requested_python, PythonEnvironment};
-use uv_normalize::{ExtraName, PackageName};
+use uv_normalize::{ExtraName, PackageName, Source};
 use uv_requirements::{
     upgrade::read_lockfile, ExtrasSpecification, LookaheadResolver, NamedRequirementsResolver,
     RequirementsSource, RequirementsSpecification, SourceTreeResolver,
@@ -344,6 +345,28 @@ pub(crate) async fn pip_compile(
     .resolve()
     .await?;
 
+    let mut sources: FxHashMap<PackageName, Vec<Source>> = FxHashMap::default();
+
+    let mut insert_source = |package_name: &PackageName, source: Source| {
+        if let Some(source_packages) = sources.get_mut(package_name) {
+            source_packages.push(source);
+        } else {
+            sources.insert(package_name.clone(), vec![source]);
+        }
+    };
+
+    for requirement in &requirements {
+        if let Some(path) = &requirement.path {
+            insert_source(&requirement.name, Source::Requirement(path.clone()));
+        }
+    }
+
+    for constraint in &constraints {
+        if let Some(path) = &constraint.path {
+            insert_source(&constraint.name, Source::Constraint(path.clone()));
+        }
+    }
+
     // Collect constraints and overrides.
     let constraints = Constraints::from_requirements(constraints);
     let overrides = Overrides::from_requirements(overrides);
@@ -557,6 +580,7 @@ pub(crate) async fn pip_compile(
         "{}",
         DisplayResolutionGraph::new(
             &resolution,
+            sources,
             &no_emit_packages,
             generate_hashes,
             include_extras,