build/bin/sage-build-env: Set SETUPTOOLS_USE_DISTUTILS here, not in build/pkgs/sagelib/spkg-install

Author: Matthias Koeppe

build/bin/sage-build-env

@@ -106,3 +106,7 @@ else
     export F77FLAGS_NON_NATIVE="$ORIGINAL_F77FLAGS"
     export F77FLAGS_O3_NON_NATIVE="$ORIGINAL_F77FLAGS"
 fi
+
+# Trac #31335: Avoid include paths leaking in from homebrew python3's distutils.cfg
+# by using setuptools' own copy of distutils instead of relying on stdlib distutils.
+export SETUPTOOLS_USE_DISTUTILS=local

build/pkgs/sagelib/spkg-install

@@ -39,10 +39,6 @@ export SAGE_SHARE=/doesnotexist
 # spec, which includes setting a symlink to the installed documentation.
 # export SAGE_DOC=/doesnotexist
 
-# Trac #31335: Avoid include paths leaking in from homebrew python3's distutils.cfg
-# by using setuptools' own copy of distutils instead of relying on stdlib distutils.
-export SETUPTOOLS_USE_DISTUTILS=local
-
 time "$PYTHON" -u setup.py --no-user-cfg build install || exit 1
 if [ "$UNAME" = "CYGWIN" ]; then
     sage-rebase.sh "$SAGE_LOCAL" 2>/dev/null;