Set base executable when returning virtual environment

crates/uv-python/src/interpreter.rs

@@ -94,6 +94,7 @@ impl Interpreter {
     pub fn with_virtualenv(self, virtualenv: VirtualEnvironment) -> Self {
         Self {
             scheme: virtualenv.scheme,
+            sys_base_executable: Some(virtualenv.base_executable),
             sys_executable: virtualenv.executable,
             sys_prefix: virtualenv.root,
             target: None,

crates/uv-python/src/virtualenv.rs

@@ -18,6 +18,9 @@ pub struct VirtualEnvironment {
     /// (Unix, Python 3.11).
     pub executable: PathBuf,
 
+    /// The path to the base executable for the environment, within the `home` directory.
+    pub base_executable: PathBuf,
+
     /// The [`Scheme`] paths for the virtualenv, as returned by (e.g.) `sysconfig.get_paths()`.
     pub scheme: Scheme,
 }

crates/uv-virtualenv/src/virtualenv.rs

@@ -400,6 +400,7 @@ pub(crate) fn create(
         },
         root: location,
         executable,
+        base_executable: base_python,
     })
 }