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-rw-r--r--pkgs/build-support/cc-wrapper/cc-wrapper.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/build-support/cc-wrapper/cc-wrapper.sh b/pkgs/build-support/cc-wrapper/cc-wrapper.sh
index f1f56cf5cec4..d2cdbf6ce0cc 100644
--- a/pkgs/build-support/cc-wrapper/cc-wrapper.sh
+++ b/pkgs/build-support/cc-wrapper/cc-wrapper.sh
@@ -1,5 +1,5 @@
 #! @shell@
-set -eu -o pipefail
+set -eu -o pipefail +o posix
 shopt -s nullglob
 
 if (( "${NIX_DEBUG:-0}" >= 7 )); then