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-rw-r--r--pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh4
1 files 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 c99ef313c10..648f19efb36 100644
--- a/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
@@ -36,12 +36,12 @@ setuptoolsShellHook() {
     echo "Finished executing setuptoolsShellHook"
 }
 
-if [ -z "$dontUseSetuptoolsBuild" ] && [ -z "$buildPhase" ]; then
+if [ -z "${dontUseSetuptoolsBuild-}" ] && [ -z "$buildPhase" ]; then
     echo "Using setuptoolsBuildPhase"
     buildPhase=setuptoolsBuildPhase
 fi
 
-if [ -z "$dontUseSetuptoolsShellHook" ] && [ -z "$shellHook" ]; then
+if [ -z "${dontUseSetuptoolsShellHook-}" ] && [ -z "$shellHook" ]; then
     echo "Using setuptoolsShellHook"
     shellHook=setuptoolsShellHook
 fi