diff --git a/crates/uv-fs/src/lib.rs b/crates/uv-fs/src/lib.rs
index 7541e6f2f..619f87b0b 100644
--- a/crates/uv-fs/src/lib.rs
+++ b/crates/uv-fs/src/lib.rs
@@ -1,7 +1,6 @@
+use fs2::FileExt;
 use std::fmt::Display;
 use std::path::{Path, PathBuf};
-
-use fs2::FileExt;
 use tempfile::NamedTempFile;
 use tracing::{debug, error, trace, warn};
 
diff --git a/crates/uv-requirements/src/specification.rs b/crates/uv-requirements/src/specification.rs
index 014f839af..3784962df 100644
--- a/crates/uv-requirements/src/specification.rs
+++ b/crates/uv-requirements/src/specification.rs
@@ -43,7 +43,7 @@ use pypi_types::VerbatimParsedUrl;
 use requirements_txt::{RequirementsTxt, RequirementsTxtRequirement};
 use uv_client::BaseClientBuilder;
 use uv_configuration::{NoBinary, NoBuild};
-use uv_fs::Simplified;
+use uv_fs::{Simplified, CWD};
 use uv_normalize::{ExtraName, PackageName};
 use uv_workspace::pyproject::PyProjectToml;
 
@@ -86,18 +86,16 @@ impl RequirementsSpecification {
     ) -> Result<Self> {
         Ok(match source {
             RequirementsSource::Package(name) => {
-                let requirement =
-                    RequirementsTxtRequirement::parse(name, std::env::current_dir()?, false)
-                        .with_context(|| format!("Failed to parse: `{name}`"))?;
+                let requirement = RequirementsTxtRequirement::parse(name, &*CWD, false)
+                    .with_context(|| format!("Failed to parse: `{name}`"))?;
                 Self {
                     requirements: vec![UnresolvedRequirementSpecification::from(requirement)],
                     ..Self::default()
                 }
             }
             RequirementsSource::Editable(name) => {
-                let requirement =
-                    RequirementsTxtRequirement::parse(name, std::env::current_dir()?, true)
-                        .with_context(|| format!("Failed to parse: `{name}`"))?;
+                let requirement = RequirementsTxtRequirement::parse(name, &*CWD, true)
+                    .with_context(|| format!("Failed to parse: `{name}`"))?;
                 Self {
                     requirements: vec![UnresolvedRequirementSpecification::from(
                         requirement.into_editable()?,
@@ -114,8 +112,7 @@ impl RequirementsSpecification {
                     return Err(anyhow::anyhow!("File not found: `{}`", path.user_display()));
                 }
 
-                let requirements_txt =
-                    RequirementsTxt::parse(path, std::env::current_dir()?, client_builder).await?;
+                let requirements_txt = RequirementsTxt::parse(path, &*CWD, client_builder).await?;
                 Self {
                     requirements: requirements_txt
                         .requirements
@@ -313,7 +310,7 @@ impl RequirementsSpecification {
 
     /// Parse an individual package requirement.
     pub fn parse_package(name: &str) -> Result<UnresolvedRequirementSpecification> {
-        let requirement = RequirementsTxtRequirement::parse(name, std::env::current_dir()?, false)
+        let requirement = RequirementsTxtRequirement::parse(name, &*CWD, false)
             .with_context(|| format!("Failed to parse: `{name}`"))?;
         Ok(UnresolvedRequirementSpecification::from(requirement))
     }
diff --git a/crates/uv-requirements/src/upgrade.rs b/crates/uv-requirements/src/upgrade.rs
index 2b1cfc6d5..365ba39f9 100644
--- a/crates/uv-requirements/src/upgrade.rs
+++ b/crates/uv-requirements/src/upgrade.rs
@@ -5,6 +5,7 @@ use anyhow::Result;
 use requirements_txt::RequirementsTxt;
 use uv_client::{BaseClientBuilder, Connectivity};
 use uv_configuration::Upgrade;
+use uv_fs::CWD;
 use uv_git::ResolvedRepositoryReference;
 use uv_resolver::{Lock, Preference, PreferenceError};
 
@@ -34,7 +35,7 @@ pub async fn read_requirements_txt(
     // Parse the requirements from the lockfile.
     let requirements_txt = RequirementsTxt::parse(
         output_file,
-        std::env::current_dir()?,
+        &*CWD,
         &BaseClientBuilder::new().connectivity(Connectivity::Offline),
     )
     .await?;
diff --git a/crates/uv-virtualenv/src/virtualenv.rs b/crates/uv-virtualenv/src/virtualenv.rs
index 1fe4f50e6..fbcf3688d 100644
--- a/crates/uv-virtualenv/src/virtualenv.rs
+++ b/crates/uv-virtualenv/src/virtualenv.rs
@@ -1,6 +1,5 @@
 //! Create a virtual environment.
 
-use std::env;
 use std::env::consts::EXE_SUFFIX;
 use std::io;
 use std::io::{BufWriter, Write};
@@ -12,7 +11,7 @@ use itertools::Itertools;
 use tracing::info;
 
 use pypi_types::Scheme;
-use uv_fs::{cachedir, Simplified};
+use uv_fs::{cachedir, Simplified, CWD};
 use uv_python::{Interpreter, VirtualEnvironment};
 use uv_version::version;
 
@@ -131,7 +130,7 @@ pub(crate) fn create(
     };
     let scripts = location.join(&interpreter.virtualenv().scripts);
     let prompt = match prompt {
-        Prompt::CurrentDirectoryName => env::current_dir()?
+        Prompt::CurrentDirectoryName => CWD
             .file_name()
             .map(|name| name.to_string_lossy().to_string()),
         Prompt::Static(value) => Some(value),
diff --git a/crates/uv/src/commands/project/add.rs b/crates/uv/src/commands/project/add.rs
index 414b5ca54..1e4da31e1 100644
--- a/crates/uv/src/commands/project/add.rs
+++ b/crates/uv/src/commands/project/add.rs
@@ -7,6 +7,7 @@ use uv_client::{BaseClientBuilder, Connectivity, FlatIndexClient, RegistryClient
 use uv_configuration::{Concurrency, ExtrasSpecification, PreviewMode, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_distribution::DistributionDatabase;
+use uv_fs::CWD;
 use uv_normalize::PackageName;
 use uv_python::{PythonFetch, PythonPreference, PythonRequest};
 use uv_requirements::{NamedRequirementsResolver, RequirementsSource, RequirementsSpecification};
@@ -55,12 +56,12 @@ pub(crate) async fn add(
 
     // Find the project in the workspace.
     let project = if let Some(package) = package {
-        Workspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default())
+        Workspace::discover(&CWD, &DiscoveryOptions::default())
             .await?
             .with_current_project(package.clone())
             .with_context(|| format!("Package `{package}` not found in workspace"))?
     } else {
-        ProjectWorkspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default()).await?
+        ProjectWorkspace::discover(&CWD, &DiscoveryOptions::default()).await?
     };
 
     // Discover or create the virtual environment.
diff --git a/crates/uv/src/commands/project/init.rs b/crates/uv/src/commands/project/init.rs
index 7ccb61ba9..f6768dfa3 100644
--- a/crates/uv/src/commands/project/init.rs
+++ b/crates/uv/src/commands/project/init.rs
@@ -3,12 +3,13 @@ use std::path::Path;
 
 use anyhow::{Context, Result};
 use owo_colors::OwoColorize;
+
 use pep440_rs::Version;
 use pep508_rs::PackageName;
 use uv_cache::Cache;
 use uv_client::{BaseClientBuilder, Connectivity};
 use uv_configuration::PreviewMode;
-use uv_fs::{absolutize_path, Simplified};
+use uv_fs::{absolutize_path, Simplified, CWD};
 use uv_python::{
     EnvironmentPreference, PythonFetch, PythonInstallation, PythonPreference, PythonRequest,
     VersionRequest,
@@ -46,7 +47,7 @@ pub(crate) async fn init(
 
     // Default to the current directory if a path was not provided.
     let path = match explicit_path {
-        None => std::env::current_dir()?.canonicalize()?,
+        None => CWD.to_path_buf(),
         Some(ref path) => absolutize_path(Path::new(path))?.to_path_buf(),
     };
 
diff --git a/crates/uv/src/commands/project/lock.rs b/crates/uv/src/commands/project/lock.rs
index a466bb82b..6088add9f 100644
--- a/crates/uv/src/commands/project/lock.rs
+++ b/crates/uv/src/commands/project/lock.rs
@@ -17,6 +17,7 @@ use uv_client::{Connectivity, FlatIndexClient, RegistryClientBuilder};
 use uv_configuration::{Concurrency, ExtrasSpecification, PreviewMode, Reinstall, SetupPyStrategy};
 use uv_dispatch::BuildDispatch;
 use uv_distribution::DEV_DEPENDENCIES;
+use uv_fs::{Simplified, CWD};
 use uv_git::ResolvedRepositoryReference;
 use uv_normalize::PackageName;
 use uv_python::{Interpreter, PythonFetch, PythonPreference, PythonRequest};
@@ -63,9 +64,9 @@ pub(crate) async fn lock(
     }
 
     let directory = if let Some(directory) = directory {
-        directory
+        directory.simple_canonicalize()?
     } else {
-        std::env::current_dir()?
+        CWD.to_path_buf()
     };
 
     // Find the project requirements.
diff --git a/crates/uv/src/commands/project/remove.rs b/crates/uv/src/commands/project/remove.rs
index 2abd969dc..c687632e2 100644
--- a/crates/uv/src/commands/project/remove.rs
+++ b/crates/uv/src/commands/project/remove.rs
@@ -4,6 +4,7 @@ use pep508_rs::PackageName;
 use uv_cache::Cache;
 use uv_client::Connectivity;
 use uv_configuration::{Concurrency, ExtrasSpecification, PreviewMode};
+use uv_fs::CWD;
 use uv_python::{PythonFetch, PythonPreference, PythonRequest};
 use uv_warnings::{warn_user, warn_user_once};
 use uv_workspace::pyproject::DependencyType;
@@ -39,12 +40,12 @@ pub(crate) async fn remove(
 
     // Find the project in the workspace.
     let project = if let Some(package) = package {
-        Workspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default())
+        Workspace::discover(&CWD, &DiscoveryOptions::default())
             .await?
             .with_current_project(package.clone())
             .with_context(|| format!("Package `{package}` not found in workspace"))?
     } else {
-        ProjectWorkspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default()).await?
+        ProjectWorkspace::discover(&CWD, &DiscoveryOptions::default()).await?
     };
 
     let mut pyproject = PyProjectTomlMut::from_toml(project.current_project().pyproject_toml())?;
diff --git a/crates/uv/src/commands/project/run.rs b/crates/uv/src/commands/project/run.rs
index 3a58ef208..bcdc1ae74 100644
--- a/crates/uv/src/commands/project/run.rs
+++ b/crates/uv/src/commands/project/run.rs
@@ -14,7 +14,7 @@ use uv_cache::Cache;
 use uv_cli::ExternalCommand;
 use uv_client::{BaseClientBuilder, Connectivity};
 use uv_configuration::{Concurrency, ExtrasSpecification, PreviewMode};
-use uv_fs::{PythonExt, Simplified};
+use uv_fs::{PythonExt, Simplified, CWD};
 use uv_installer::{SatisfiesResult, SitePackages};
 use uv_normalize::PackageName;
 use uv_python::{
@@ -93,7 +93,7 @@ pub(crate) async fn run(
     let directory = if let Some(directory) = directory {
         directory.simple_canonicalize()?
     } else {
-        std::env::current_dir()?
+        CWD.to_path_buf()
     };
 
     // Determine whether the command to execute is a PEP 723 script.
diff --git a/crates/uv/src/commands/project/sync.rs b/crates/uv/src/commands/project/sync.rs
index 6a9f20ca0..42c645304 100644
--- a/crates/uv/src/commands/project/sync.rs
+++ b/crates/uv/src/commands/project/sync.rs
@@ -1,5 +1,7 @@
-use anyhow::Result;
 use std::path::PathBuf;
+
+use anyhow::Result;
+
 use uv_auth::store_credentials_from_url;
 use uv_cache::Cache;
 use uv_client::{Connectivity, FlatIndexClient, RegistryClientBuilder};
@@ -8,6 +10,7 @@ use uv_configuration::{
 };
 use uv_dispatch::BuildDispatch;
 use uv_distribution::DEV_DEPENDENCIES;
+use uv_fs::{Simplified, CWD};
 use uv_installer::SitePackages;
 use uv_python::{PythonEnvironment, PythonFetch, PythonPreference, PythonRequest};
 use uv_resolver::{FlatIndex, Lock};
@@ -47,9 +50,9 @@ pub(crate) async fn sync(
     }
 
     let directory = if let Some(directory) = directory {
-        directory
+        directory.simple_canonicalize()?
     } else {
-        std::env::current_dir()?
+        CWD.to_path_buf()
     };
 
     // Identify the project
diff --git a/crates/uv/src/commands/project/tree.rs b/crates/uv/src/commands/project/tree.rs
index 6bbc6a5ea..0a410e3e8 100644
--- a/crates/uv/src/commands/project/tree.rs
+++ b/crates/uv/src/commands/project/tree.rs
@@ -8,6 +8,7 @@ use pep508_rs::PackageName;
 use uv_cache::Cache;
 use uv_client::Connectivity;
 use uv_configuration::{Concurrency, PreviewMode};
+use uv_fs::CWD;
 use uv_python::{PythonFetch, PythonPreference, PythonRequest};
 use uv_warnings::warn_user_once;
 use uv_workspace::{DiscoveryOptions, Workspace};
@@ -47,8 +48,7 @@ pub(crate) async fn tree(
     }
 
     // Find the project requirements.
-    let workspace =
-        Workspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default()).await?;
+    let workspace = Workspace::discover(&CWD, &DiscoveryOptions::default()).await?;
 
     // Find an interpreter for the project
     let interpreter = FoundInterpreter::discover(
diff --git a/crates/uv/src/commands/python/install.rs b/crates/uv/src/commands/python/install.rs
index 6032f0ad3..79d594bbe 100644
--- a/crates/uv/src/commands/python/install.rs
+++ b/crates/uv/src/commands/python/install.rs
@@ -11,6 +11,7 @@ use tracing::debug;
 use uv_cache::Cache;
 use uv_client::Connectivity;
 use uv_configuration::PreviewMode;
+use uv_fs::CWD;
 use uv_python::downloads::{DownloadResult, ManagedPythonDownload, PythonDownloadRequest};
 use uv_python::managed::{ManagedPythonInstallation, ManagedPythonInstallations};
 use uv_python::{
@@ -55,7 +56,7 @@ pub(crate) async fn install(
             }
             None
         } else {
-            requests_from_version_file(&std::env::current_dir()?).await?
+            requests_from_version_file(&CWD).await?
         };
         version_file_requests.unwrap_or_else(|| vec![PythonRequest::Any])
     } else {
diff --git a/crates/uv/src/commands/python/pin.rs b/crates/uv/src/commands/python/pin.rs
index 74053a2b2..0038b42c0 100644
--- a/crates/uv/src/commands/python/pin.rs
+++ b/crates/uv/src/commands/python/pin.rs
@@ -7,7 +7,7 @@ use tracing::debug;
 
 use uv_cache::Cache;
 use uv_configuration::PreviewMode;
-use uv_fs::Simplified;
+use uv_fs::{Simplified, CWD};
 use uv_python::{
     request_from_version_file, requests_from_version_file, write_version_file,
     EnvironmentPreference, PythonInstallation, PythonPreference, PythonRequest,
@@ -36,9 +36,7 @@ pub(crate) async fn pin(
     let virtual_project = if isolated {
         None
     } else {
-        match VirtualProject::discover(&std::env::current_dir()?, &DiscoveryOptions::default())
-            .await
-        {
+        match VirtualProject::discover(&CWD, &DiscoveryOptions::default()).await {
             Ok(virtual_project) => Some(virtual_project),
             Err(err) => {
                 debug!("Failed to discover virtual project: {err}");
@@ -49,7 +47,7 @@ pub(crate) async fn pin(
 
     let Some(request) = request else {
         // Display the current pinned Python version
-        if let Some(pins) = requests_from_version_file(&std::env::current_dir()?).await? {
+        if let Some(pins) = requests_from_version_file(&CWD).await? {
             for pin in pins {
                 writeln!(printer.stdout(), "{}", pin.to_canonical_string())?;
                 if let Some(virtual_project) = &virtual_project {
@@ -126,10 +124,7 @@ pub(crate) async fn pin(
         request.to_canonical_string()
     };
 
-    let existing = request_from_version_file(&std::env::current_dir()?)
-        .await
-        .ok()
-        .flatten();
+    let existing = request_from_version_file(&CWD).await.ok().flatten();
     write_version_file(&output).await?;
 
     if let Some(existing) = existing
diff --git a/crates/uv/src/lib.rs b/crates/uv/src/lib.rs
index 4620bd33e..8c1956b95 100644
--- a/crates/uv/src/lib.rs
+++ b/crates/uv/src/lib.rs
@@ -21,6 +21,7 @@ use uv_cli::{PythonCommand, PythonNamespace, ToolCommand, ToolNamespace};
 #[cfg(feature = "self-update")]
 use uv_cli::{SelfCommand, SelfNamespace};
 use uv_configuration::Concurrency;
+use uv_fs::CWD;
 use uv_requirements::RequirementsSource;
 use uv_settings::{Combine, FilesystemOptions};
 use uv_workspace::{DiscoveryOptions, Workspace};
@@ -73,14 +74,12 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
         Some(FilesystemOptions::from_file(config_file)?)
     } else if cli.global_args.isolated || cli.no_config {
         None
-    } else if let Ok(project) =
-        Workspace::discover(&std::env::current_dir()?, &DiscoveryOptions::default()).await
-    {
+    } else if let Ok(project) = Workspace::discover(&CWD, &DiscoveryOptions::default()).await {
         let project = FilesystemOptions::from_directory(project.install_path())?;
         let user = FilesystemOptions::user()?;
         project.combine(user)
     } else {
-        let project = FilesystemOptions::find(std::env::current_dir()?)?;
+        let project = FilesystemOptions::find(&*CWD)?;
         let user = FilesystemOptions::user()?;
         project.combine(user)
     };