diff --git a/crates/uv-resolver/src/lock/mod.rs b/crates/uv-resolver/src/lock/mod.rs
index 540a597a6..577a047c7 100644
--- a/crates/uv-resolver/src/lock/mod.rs
+++ b/crates/uv-resolver/src/lock/mod.rs
@@ -974,7 +974,6 @@ impl Lock {
         overrides: &[Requirement],
         dependency_metadata: &DependencyMetadata,
         indexes: Option<&IndexLocations>,
-        build_options: &BuildOptions,
         tags: &Tags,
         hasher: &HashStrategy,
         index: &InMemoryIndex,
@@ -1183,8 +1182,13 @@ impl Lock {
             // Get the metadata for the distribution.
             let dist = package.to_dist(
                 workspace.install_path(),
+                // When validating, it's okay to use wheels that don't match the current platform.
                 TagPolicy::Preferred(tags),
-                build_options,
+                // When validating, it's okay to use (e.g.) a source distribution with `--no-build`.
+                // We're just trying to determine whether the lockfile is up-to-date. If we end
+                // up needing to build a source distribution in order to do so, below, we'll error
+                // there.
+                &BuildOptions::default(),
             )?;
 
             // Fetch the metadata for the distribution.
diff --git a/crates/uv/src/commands/project/lock.rs b/crates/uv/src/commands/project/lock.rs
index f7ad9b990..9e141d3df 100644
--- a/crates/uv/src/commands/project/lock.rs
+++ b/crates/uv/src/commands/project/lock.rs
@@ -11,8 +11,7 @@ use tracing::debug;
 use uv_cache::Cache;
 use uv_client::{Connectivity, FlatIndexClient, RegistryClientBuilder};
 use uv_configuration::{
-    BuildOptions, Concurrency, Constraints, ExtrasSpecification, LowerBound, Reinstall,
-    TrustedHost, Upgrade,
+    Concurrency, Constraints, ExtrasSpecification, LowerBound, Reinstall, TrustedHost, Upgrade,
 };
 use uv_dispatch::BuildDispatch;
 use uv_distribution::DistributionDatabase;
@@ -531,7 +530,6 @@ async fn do_lock(
             interpreter,
             &requires_python,
             index_locations,
-            build_options,
             upgrade,
             &options,
             &hasher,
@@ -714,7 +712,6 @@ impl ValidatedLock {
         interpreter: &Interpreter,
         requires_python: &RequiresPython,
         index_locations: &IndexLocations,
-        build_options: &BuildOptions,
         upgrade: &Upgrade,
         options: &Options,
         hasher: &HashStrategy,
@@ -841,7 +838,6 @@ impl ValidatedLock {
                 overrides,
                 dependency_metadata,
                 indexes,
-                build_options,
                 interpreter.tags()?,
                 hasher,
                 index,
diff --git a/crates/uv/tests/it/sync.rs b/crates/uv/tests/it/sync.rs
index 86d038722..f95f9d4d1 100644
--- a/crates/uv/tests/it/sync.rs
+++ b/crates/uv/tests/it/sync.rs
@@ -1997,20 +1997,18 @@ fn no_install_project_no_build() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    warning: Failed to validate existing lockfile: Distribution `project==0.1.0 @ editable+.` can't be installed because it is marked as `--no-build` but has no binary distribution
     Resolved 4 packages in [TIME]
     error: Distribution `project==0.1.0 @ editable+.` can't be installed because it is marked as `--no-build` but has no binary distribution
     "###);
 
     // But it's fine to combine `--no-install-project` with `--no-build`. We shouldn't error, since
     // we aren't building the project.
-    uv_snapshot!(context.filters(), context.sync().arg("--no-install-project").arg("--no-build"), @r###"
+    uv_snapshot!(context.filters(), context.sync().arg("--no-install-project").arg("--no-build").arg("--locked"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
 
     ----- stderr -----
-    warning: Failed to validate existing lockfile: Distribution `project==0.1.0 @ editable+.` can't be installed because it is marked as `--no-build` but has no binary distribution
     Resolved 4 packages in [TIME]
     Prepared 3 packages in [TIME]
     Installed 3 packages in [TIME]