diff --git a/crates/uv-build-frontend/src/lib.rs b/crates/uv-build-frontend/src/lib.rs
index 1ef439788..13335614b 100644
--- a/crates/uv-build-frontend/src/lib.rs
+++ b/crates/uv-build-frontend/src/lib.rs
@@ -588,6 +588,7 @@ impl SourceBuild {
                                     install_path,
                                     locations,
                                     source_strategy,
+                                    None,
                                     workspace_cache,
                                 )
                                 .await
@@ -1054,6 +1055,7 @@ async fn create_pep517_build_environment(
                 install_path,
                 locations,
                 source_strategy,
+                build_context.workspace_member_editable(),
                 workspace_cache,
             )
             .await
diff --git a/crates/uv-dispatch/src/lib.rs b/crates/uv-dispatch/src/lib.rs
index 1b8570bab..8d609eca2 100644
--- a/crates/uv-dispatch/src/lib.rs
+++ b/crates/uv-dispatch/src/lib.rs
@@ -100,6 +100,7 @@ pub struct BuildDispatch<'a> {
     source_build_context: SourceBuildContext,
     build_extra_env_vars: FxHashMap<OsString, OsString>,
     sources: SourceStrategy,
+    workspace_member_editable: Option<bool>,
     workspace_cache: WorkspaceCache,
     concurrency: Concurrency,
     preview: Preview,
@@ -126,6 +127,7 @@ impl<'a> BuildDispatch<'a> {
         hasher: &'a HashStrategy,
         exclude_newer: ExcludeNewer,
         sources: SourceStrategy,
+        workspace_member_editable: Option<bool>,
         workspace_cache: WorkspaceCache,
         concurrency: Concurrency,
         preview: Preview,
@@ -152,6 +154,7 @@ impl<'a> BuildDispatch<'a> {
             source_build_context: SourceBuildContext::default(),
             build_extra_env_vars: FxHashMap::default(),
             sources,
+            workspace_member_editable,
             workspace_cache,
             concurrency,
             preview,
@@ -222,6 +225,10 @@ impl BuildContext for BuildDispatch<'_> {
         self.sources
     }
 
+    fn workspace_member_editable(&self) -> Option<bool> {
+        self.workspace_member_editable
+    }
+
     fn locations(&self) -> &IndexLocations {
         self.index_locations
     }
diff --git a/crates/uv-distribution/src/metadata/build_requires.rs b/crates/uv-distribution/src/metadata/build_requires.rs
index 723ca4f96..c790d9496 100644
--- a/crates/uv-distribution/src/metadata/build_requires.rs
+++ b/crates/uv-distribution/src/metadata/build_requires.rs
@@ -41,6 +41,7 @@ impl BuildRequires {
         install_path: &Path,
         locations: &IndexLocations,
         sources: SourceStrategy,
+        workspace_member_editable: Option<bool>,
         cache: &WorkspaceCache,
     ) -> Result<Self, MetadataError> {
         let discovery = match sources {
@@ -56,7 +57,7 @@ impl BuildRequires {
             return Ok(Self::from_metadata23(metadata));
         };
 
-        Self::from_project_workspace(metadata, &project_workspace, locations, sources)
+        Self::from_project_workspace(metadata, &project_workspace, locations, sources, workspace_member_editable)
     }
 
     /// Lower the `build-system.requires` field from a `pyproject.toml` file.
@@ -65,6 +66,7 @@ impl BuildRequires {
         project_workspace: &ProjectWorkspace,
         locations: &IndexLocations,
         source_strategy: SourceStrategy,
+        workspace_member_editable: Option<bool>,
     ) -> Result<Self, MetadataError> {
         // Collect any `tool.uv.index` entries.
         let empty = vec![];
@@ -114,6 +116,7 @@ impl BuildRequires {
                         locations,
                         project_workspace.workspace(),
                         None,
+                        workspace_member_editable,
                     )
                     .map(move |requirement| match requirement {
                         Ok(requirement) => Ok(requirement.into_inner()),
@@ -186,6 +189,7 @@ impl BuildRequires {
                         locations,
                         workspace,
                         None,
+                        None,
                     )
                     .map(move |requirement| match requirement {
                         Ok(requirement) => Ok(requirement.into_inner()),
@@ -271,6 +275,7 @@ impl LoweredExtraBuildDependencies {
                                     index_locations,
                                     workspace,
                                     None,
+                                    None,
                                 )
                                 .map(move |requirement| {
                                     match requirement {
diff --git a/crates/uv-distribution/src/metadata/dependency_groups.rs b/crates/uv-distribution/src/metadata/dependency_groups.rs
index d12e0651d..a4f3468e8 100644
--- a/crates/uv-distribution/src/metadata/dependency_groups.rs
+++ b/crates/uv-distribution/src/metadata/dependency_groups.rs
@@ -156,6 +156,7 @@ impl SourcedDependencyGroups {
                             locations,
                             project.workspace(),
                             git_member,
+                            None,
                         )
                         .map(move |requirement| match requirement {
                             Ok(requirement) => Ok(requirement.into_inner()),
diff --git a/crates/uv-distribution/src/metadata/lowering.rs b/crates/uv-distribution/src/metadata/lowering.rs
index 627e2d4dd..67feaaaed 100644
--- a/crates/uv-distribution/src/metadata/lowering.rs
+++ b/crates/uv-distribution/src/metadata/lowering.rs
@@ -44,6 +44,7 @@ impl LoweredRequirement {
         locations: &'data IndexLocations,
         workspace: &'data Workspace,
         git_member: Option<&'data GitWorkspaceMember<'data>>,
+        workspace_member_editable: Option<bool>,
     ) -> impl Iterator<Item = Result<Self, LoweringError>> + use<'data> + 'data {
         // Identify the source from the `tool.uv.sources` table.
         let (sources, origin) = if let Some(source) = project_sources.get(&requirement.name) {
@@ -313,7 +314,7 @@ impl LoweredRequirement {
                                     RequirementSource::Directory {
                                         install_path: install_path.into_boxed_path(),
                                         url,
-                                        editable: Some(editability.unwrap_or(true)),
+                                        editable: Some(editability.unwrap_or(workspace_member_editable.unwrap_or(true))),
                                         r#virtual: Some(false),
                                     }
                                 } else {
diff --git a/crates/uv-distribution/src/metadata/mod.rs b/crates/uv-distribution/src/metadata/mod.rs
index 3557de15e..7c5d28ebb 100644
--- a/crates/uv-distribution/src/metadata/mod.rs
+++ b/crates/uv-distribution/src/metadata/mod.rs
@@ -90,6 +90,7 @@ impl Metadata {
         git_source: Option<&GitWorkspaceMember<'_>>,
         locations: &IndexLocations,
         sources: SourceStrategy,
+        workspace_member_editable: Option<bool>,
         cache: &WorkspaceCache,
     ) -> Result<Self, MetadataError> {
         // Lower the requirements.
@@ -111,6 +112,7 @@ impl Metadata {
             git_source,
             locations,
             sources,
+            workspace_member_editable,
             cache,
         )
         .await?;
diff --git a/crates/uv-distribution/src/metadata/requires_dist.rs b/crates/uv-distribution/src/metadata/requires_dist.rs
index eb0c007f9..4f6346626 100644
--- a/crates/uv-distribution/src/metadata/requires_dist.rs
+++ b/crates/uv-distribution/src/metadata/requires_dist.rs
@@ -47,6 +47,7 @@ impl RequiresDist {
         git_member: Option<&GitWorkspaceMember<'_>>,
         locations: &IndexLocations,
         sources: SourceStrategy,
+        workspace_member_editable: Option<bool>,
         cache: &WorkspaceCache,
     ) -> Result<Self, MetadataError> {
         let discovery = DiscoveryOptions {
@@ -69,7 +70,7 @@ impl RequiresDist {
             return Ok(Self::from_metadata23(metadata));
         };
 
-        Self::from_project_workspace(metadata, &project_workspace, git_member, locations, sources)
+        Self::from_project_workspace(metadata, &project_workspace, git_member, locations, sources, workspace_member_editable)
     }
 
     fn from_project_workspace(
@@ -78,6 +79,7 @@ impl RequiresDist {
         git_member: Option<&GitWorkspaceMember<'_>>,
         locations: &IndexLocations,
         source_strategy: SourceStrategy,
+        workspace_member_editable: Option<bool>,
     ) -> Result<Self, MetadataError> {
         // Collect any `tool.uv.index` entries.
         let empty = vec![];
@@ -140,6 +142,7 @@ impl RequiresDist {
                                 locations,
                                 project_workspace.workspace(),
                                 git_member,
+                                workspace_member_editable,
                             )
                             .map(
                                 move |requirement| match requirement {
@@ -182,6 +185,7 @@ impl RequiresDist {
                         locations,
                         project_workspace.workspace(),
                         git_member,
+                        workspace_member_editable,
                     )
                     .map(move |requirement| match requirement {
                         Ok(requirement) => Ok(requirement.into_inner()),
@@ -468,6 +472,7 @@ mod test {
             None,
             &IndexLocations::default(),
             SourceStrategy::default(),
+            None,
         )?)
     }
 
diff --git a/crates/uv-distribution/src/source/mod.rs b/crates/uv-distribution/src/source/mod.rs
index 1a22ada94..b0a5da43c 100644
--- a/crates/uv-distribution/src/source/mod.rs
+++ b/crates/uv-distribution/src/source/mod.rs
@@ -1264,6 +1264,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                         None,
                         self.build_context.locations(),
                         self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                         self.build_context.workspace_cache(),
                     )
                     .await?,
@@ -1317,6 +1318,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                             None,
                             self.build_context.locations(),
                             self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                             self.build_context.workspace_cache(),
                         )
                         .await?,
@@ -1366,6 +1368,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     None,
                     self.build_context.locations(),
                     self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                     self.build_context.workspace_cache(),
                 )
                 .await?,
@@ -1427,6 +1430,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 None,
                 self.build_context.locations(),
                 self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                 self.build_context.workspace_cache(),
             )
             .await?,
@@ -1501,6 +1505,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     None,
                     self.build_context.locations(),
                     self.build_context.sources(),
+                    self.build_context.workspace_member_editable(),
                     self.build_context.workspace_cache(),
                 )
                 .await?;
@@ -1801,6 +1806,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                             Some(&git_member),
                             self.build_context.locations(),
                             self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                             self.build_context.workspace_cache(),
                         )
                         .await?,
@@ -1834,6 +1840,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                                 Some(&git_member),
                                 self.build_context.locations(),
                                 self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                                 self.build_context.workspace_cache(),
                             )
                             .await?,
@@ -1886,6 +1893,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                     Some(&git_member),
                     self.build_context.locations(),
                     self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                     self.build_context.workspace_cache(),
                 )
                 .await?,
@@ -1947,6 +1955,7 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
                 Some(&git_member),
                 self.build_context.locations(),
                 self.build_context.sources(),
+                        self.build_context.workspace_member_editable(),
                 self.build_context.workspace_cache(),
             )
             .await?,
diff --git a/crates/uv-types/src/traits.rs b/crates/uv-types/src/traits.rs
index 6054ba302..941f6712a 100644
--- a/crates/uv-types/src/traits.rs
+++ b/crates/uv-types/src/traits.rs
@@ -99,6 +99,15 @@ pub trait BuildContext {
     /// Whether to incorporate `tool.uv.sources` when resolving requirements.
     fn sources(&self) -> SourceStrategy;
 
+    /// Whether workspace members should be installed as editable.
+    ///
+    /// Returns `None` for default behavior (editable), or `Some(false)` to force non-editable
+    /// installations. This is primarily used by `uv tool install` to ensure workspace dependencies
+    /// are vendored rather than linked via `.pth` files.
+    fn workspace_member_editable(&self) -> Option<bool> {
+        None
+    }
+
     /// The index locations being searched.
     fn locations(&self) -> &IndexLocations;
 
diff --git a/crates/uv/src/commands/build_frontend.rs b/crates/uv/src/commands/build_frontend.rs
index 08b5a32df..e6517a8a0 100644
--- a/crates/uv/src/commands/build_frontend.rs
+++ b/crates/uv/src/commands/build_frontend.rs
@@ -612,6 +612,7 @@ async fn build_package(
         &hasher,
         exclude_newer,
         sources,
+        None,
         workspace_cache,
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/pip/compile.rs b/crates/uv/src/commands/pip/compile.rs
index aa89884ea..fe769f4ac 100644
--- a/crates/uv/src/commands/pip/compile.rs
+++ b/crates/uv/src/commands/pip/compile.rs
@@ -511,6 +511,7 @@ pub(crate) async fn pip_compile(
         &build_hashes,
         exclude_newer.clone(),
         sources,
+        None,
         WorkspaceCache::default(),
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/pip/install.rs b/crates/uv/src/commands/pip/install.rs
index b513faa79..72206b0a0 100644
--- a/crates/uv/src/commands/pip/install.rs
+++ b/crates/uv/src/commands/pip/install.rs
@@ -478,6 +478,7 @@ pub(crate) async fn pip_install(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         WorkspaceCache::default(),
         concurrency,
         preview,
@@ -613,6 +614,7 @@ pub(crate) async fn pip_install(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         WorkspaceCache::default(),
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/pip/sync.rs b/crates/uv/src/commands/pip/sync.rs
index 0cc7c9d9a..cdc536fb7 100644
--- a/crates/uv/src/commands/pip/sync.rs
+++ b/crates/uv/src/commands/pip/sync.rs
@@ -387,6 +387,7 @@ pub(crate) async fn pip_sync(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         WorkspaceCache::default(),
         concurrency,
         preview,
@@ -524,6 +525,7 @@ pub(crate) async fn pip_sync(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         WorkspaceCache::default(),
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/project/add.rs b/crates/uv/src/commands/project/add.rs
index cc06ce97b..51e7d651b 100644
--- a/crates/uv/src/commands/project/add.rs
+++ b/crates/uv/src/commands/project/add.rs
@@ -467,6 +467,7 @@ pub(crate) async fn add(
                 &build_hasher,
                 settings.resolver.exclude_newer.clone(),
                 sources,
+                None,
                 // No workspace caching since `uv add` changes the workspace definition.
                 WorkspaceCache::default(),
                 concurrency,
diff --git a/crates/uv/src/commands/project/environment.rs b/crates/uv/src/commands/project/environment.rs
index e8ecc6bc6..0e291d394 100644
--- a/crates/uv/src/commands/project/environment.rs
+++ b/crates/uv/src/commands/project/environment.rs
@@ -139,6 +139,7 @@ impl CachedEnvironment {
                 resolve,
                 concurrency,
                 cache,
+                None,
                 printer,
                 preview,
             )
diff --git a/crates/uv/src/commands/project/lock.rs b/crates/uv/src/commands/project/lock.rs
index 5363a365a..6e8dcb987 100644
--- a/crates/uv/src/commands/project/lock.rs
+++ b/crates/uv/src/commands/project/lock.rs
@@ -734,6 +734,7 @@ async fn do_lock(
         &build_hasher,
         exclude_newer.clone(),
         *sources,
+        None,
         workspace_cache.clone(),
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/project/mod.rs b/crates/uv/src/commands/project/mod.rs
index 785874c6e..4b89df01a 100644
--- a/crates/uv/src/commands/project/mod.rs
+++ b/crates/uv/src/commands/project/mod.rs
@@ -1669,6 +1669,7 @@ pub(crate) async fn resolve_names(
     concurrency: Concurrency,
     cache: &Cache,
     workspace_cache: &WorkspaceCache,
+    workspace_member_editable: Option<bool>,
     printer: Printer,
     preview: Preview,
 ) -> Result<Vec<Requirement>, uv_requirements::Error> {
@@ -1771,6 +1772,7 @@ pub(crate) async fn resolve_names(
         &build_hasher,
         exclude_newer.clone(),
         *sources,
+        workspace_member_editable,
         workspace_cache.clone(),
         concurrency,
         preview,
@@ -1842,6 +1844,7 @@ pub(crate) async fn resolve_environment(
     logger: Box<dyn ResolveLogger>,
     concurrency: Concurrency,
     cache: &Cache,
+    workspace_member_editable: Option<bool>,
     printer: Printer,
     preview: Preview,
 ) -> Result<ResolverOutput, ProjectError> {
@@ -1982,6 +1985,7 @@ pub(crate) async fn resolve_environment(
         &build_hasher,
         exclude_newer.clone(),
         *sources,
+        workspace_member_editable,
         workspace_cache,
         concurrency,
         preview,
@@ -2120,6 +2124,7 @@ pub(crate) async fn sync_environment(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         workspace_cache,
         concurrency,
         preview,
@@ -2351,6 +2356,7 @@ pub(crate) async fn update_environment(
         &build_hasher,
         exclude_newer.clone(),
         *sources,
+        None,
         workspace_cache,
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/project/sync.rs b/crates/uv/src/commands/project/sync.rs
index 1225f3757..bc4f52cfa 100644
--- a/crates/uv/src/commands/project/sync.rs
+++ b/crates/uv/src/commands/project/sync.rs
@@ -777,6 +777,7 @@ pub(super) async fn do_sync(
         &build_hasher,
         exclude_newer.clone(),
         sources,
+        None,
         workspace_cache.clone(),
         concurrency,
         preview,
diff --git a/crates/uv/src/commands/tool/install.rs b/crates/uv/src/commands/tool/install.rs
index 0f35ad70c..17f922f83 100644
--- a/crates/uv/src/commands/tool/install.rs
+++ b/crates/uv/src/commands/tool/install.rs
@@ -145,6 +145,7 @@ pub(crate) async fn install(
                 concurrency,
                 &cache,
                 &workspace_cache,
+                Some(false),
                 printer,
                 preview,
             )
@@ -270,6 +271,7 @@ pub(crate) async fn install(
                 concurrency,
                 &cache,
                 &workspace_cache,
+                Some(false),
                 printer,
                 preview,
             )
@@ -295,6 +297,7 @@ pub(crate) async fn install(
         concurrency,
         &cache,
         &workspace_cache,
+        Some(false),
         printer,
         preview,
     )
@@ -516,6 +519,7 @@ pub(crate) async fn install(
             Box::new(DefaultResolveLogger),
             concurrency,
             &cache,
+            Some(false),
             printer,
             preview,
         )
@@ -571,6 +575,7 @@ pub(crate) async fn install(
                         Box::new(DefaultResolveLogger),
                         concurrency,
                         &cache,
+                        Some(false),
                         printer,
                         preview,
                     )
diff --git a/crates/uv/src/commands/tool/run.rs b/crates/uv/src/commands/tool/run.rs
index 918d014f9..5a723a125 100644
--- a/crates/uv/src/commands/tool/run.rs
+++ b/crates/uv/src/commands/tool/run.rs
@@ -801,6 +801,7 @@ async fn get_or_create_environment(
                         concurrency,
                         cache,
                         &workspace_cache,
+                        None,
                         printer,
                         preview,
                     )
@@ -892,6 +893,7 @@ async fn get_or_create_environment(
                 concurrency,
                 cache,
                 &workspace_cache,
+                None,
                 printer,
                 preview,
             )
@@ -918,6 +920,7 @@ async fn get_or_create_environment(
         concurrency,
         cache,
         &workspace_cache,
+        None,
         printer,
         preview,
     )
diff --git a/crates/uv/src/commands/tool/upgrade.rs b/crates/uv/src/commands/tool/upgrade.rs
index 330673c24..f1c1ad6f9 100644
--- a/crates/uv/src/commands/tool/upgrade.rs
+++ b/crates/uv/src/commands/tool/upgrade.rs
@@ -355,6 +355,7 @@ async fn upgrade_tool(
             Box::new(SummaryResolveLogger),
             concurrency,
             cache,
+            None,
             printer,
             preview,
         )
diff --git a/crates/uv/src/commands/venv.rs b/crates/uv/src/commands/venv.rs
index 13fe8fb51..142e4926e 100644
--- a/crates/uv/src/commands/venv.rs
+++ b/crates/uv/src/commands/venv.rs
@@ -275,6 +275,7 @@ pub(crate) async fn venv(
             &build_hasher,
             exclude_newer,
             sources,
+            None,
             workspace_cache,
             concurrency,
             preview,