diff --git a/pkgs/build-support/cc-wrapper/cc-wrapper.sh b/pkgs/build-support/cc-wrapper/cc-wrapper.sh
index a6120931381e..eb5b99643dba 100644
--- a/pkgs/build-support/cc-wrapper/cc-wrapper.sh
+++ b/pkgs/build-support/cc-wrapper/cc-wrapper.sh
@@ -249,7 +249,7 @@ if (( "${NIX_DEBUG:-0}" >= 1 )); then
     printf "  %q\n" ${extraAfter+"${extraAfter[@]}"} >&2
 fi
 
-PATH="$path_backup"
+export PATH="$path_backup"
 # Old bash workaround, see above.
 
 if (( "${NIX_CC_USE_RESPONSE_FILE:-@use_response_file_by_default@}" >= 1 )); then
diff --git a/pkgs/build-support/cc-wrapper/gnat-wrapper.sh b/pkgs/build-support/cc-wrapper/gnat-wrapper.sh
index e75eb3eb1ebf..64add8055479 100644
--- a/pkgs/build-support/cc-wrapper/gnat-wrapper.sh
+++ b/pkgs/build-support/cc-wrapper/gnat-wrapper.sh
@@ -174,7 +174,7 @@ if (( "${NIX_DEBUG:-0}" >= 1 )); then
     printf "  %q\n" ${extraAfter+"${extraAfter[@]}"} >&2
 fi
 
-PATH="$path_backup"
+export PATH="$path_backup"
 # Old bash workaround, see above.
 exec @prog@ \
     ${extraBefore+"${extraBefore[@]}"} \