Quote the arguments to pip (#209)

This fixes quoting in the pip arguments. Otherwise:
```
.venv-pyodide/bin/pip install 'pkg; sys_platform != "emscripten"'
```
will fail because the quotes are removed and it is interpretered as a
request to install packages named pkg, sys_platform, !=, and emscripten.

This fixes another regression introduced in #185.

Author: hoodmane

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+- Fixed a regression in quoting of pip arguments introduced in
+  [#185](https://github.com/pyodide/pyodide-build/pull/185).
+  [#209](https://github.com/pyodide/pyodide-build/pull/209)
+
 ## [0.30.4] - 2025/05/20
 
 - Fixed compatibility with `virtualenv` 20.31 and later. The Pyodide virtual environment via `pyodide venv` no longer seeds

pyodide_build/out_of_tree/venv.py

@@ -252,7 +252,7 @@ def create_pip_script(venv_bin):
         dedent(
             f"""\
             #!/bin/sh
-            exec env PYTHONHOME={pythonhome} {python_host_link} $@
+            exec env PYTHONHOME={pythonhome} {python_host_link} "$@"
             """
         )
     )