From a649d4f03832964080ca853695cd74d5fbaafa14 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 24 Apr 2022 07:18:34 +0100
Subject: [PATCH] python: use whitespace to split possible existing options

Noticed option globbing when tried to enable parallelism by default
locally for most packages by default. python3Packages.yt-dlp failed as:

    python3.9-yt-dlp> /nix/store/5mywvxdjkk1q6srwwwgdkzc37ibla801-python3.9-setuptools-61.2.0/lib/python3.9/site-packages/setuptools/dist.py:516: UserWarning: Normalizing '2022.04.08' to '2022.4.8'
    python3.9-yt-dlp>   warnings.warn(tmpl.format(**locals()))
    python3.9-yt-dlp> invalid command name 'build_lazy_extractors--parallel'

The change adds leading whitespace everywhere where options might
already be present.
---
 .../interpreters/python/hooks/setuptools-build-hook.sh        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh b/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
index 89a95e982197..958a9378ef14 100644
--- a/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
@@ -12,10 +12,10 @@ setuptoolsBuildPhase() {
         args+="$setupPyGlobalFlags"
     fi
     if [ -n "$enableParallelBuilding" ]; then
-        setupPyBuildFlags+="--parallel $NIX_BUILD_CORES"
+        setupPyBuildFlags+=" --parallel $NIX_BUILD_CORES"
     fi
     if [ -n "$setupPyBuildFlags" ]; then
-        args+="build_ext $setupPyBuildFlags"
+        args+=" build_ext $setupPyBuildFlags"
     fi
     eval "@pythonInterpreter@ nix_run_setup $args bdist_wheel"