fix: set UV_PYTHON for before_build on Linux when using uv (#2830)

Co-authored-by: Matthieu Darbois <mayeut@users.noreply.github.com>
2026-05-05 05:39:14 +05:30
parent d593457f60
commit a76fca878d
1 changed files with 10 additions and 1 deletions
@@ -265,7 +265,16 @@ def build_in_container(
                    project=container_project_path,
                    package=container_package_dir,
                )
-                container.call(["sh", "-c", before_build_prepared], env=env)
+                before_build_env = env.copy()
+                if use_uv:
+                    # On Linux, no virtualenv is created for the build environment
+                    # (unlike macOS/Windows, where one is set up before before_build
+                    # runs). uv requires either an active venv or an explicit Python
+                    # target to install packages. Pin UV_PYTHON to the exact interpreter
+                    # for this build so that `uv pip install` works in before_build
+                    # without requiring users to pass --system.
+                    before_build_env["UV_PYTHON"] = str(python_bin / "python")
+                container.call(["sh", "-c", before_build_prepared], env=before_build_env)

            log.step("Building wheel...")