diff --git a/pkgs/build-support/setup-hooks/patch-shebangs.sh b/pkgs/build-support/setup-hooks/patch-shebangs.sh
index 0553eb04b111..f22da254a791 100644
--- a/pkgs/build-support/setup-hooks/patch-shebangs.sh
+++ b/pkgs/build-support/setup-hooks/patch-shebangs.sh
@@ -24,7 +24,7 @@ fixupOutputHooks+=(patchShebangsAuto)
 
 patchShebangs() {
     local pathName
-    local update
+    local update=false
 
     while [[ $# -gt 0 ]]; do
         case "$1" in
diff --git a/pkgs/build-support/setup-hooks/wrap-gapps-hook/wrap-gapps-hook.sh b/pkgs/build-support/setup-hooks/wrap-gapps-hook/wrap-gapps-hook.sh
index b2e52f574a52..7487dabd5aad 100644
--- a/pkgs/build-support/setup-hooks/wrap-gapps-hook/wrap-gapps-hook.sh
+++ b/pkgs/build-support/setup-hooks/wrap-gapps-hook/wrap-gapps-hook.sh
@@ -28,7 +28,7 @@ gappsWrapperArgsHook() {
     fi
 
     for v in ${wrapPrefixVariables:-} GST_PLUGIN_SYSTEM_PATH_1_0 GI_TYPELIB_PATH GRL_PLUGIN_PATH; do
-        if [ -n "${!v}" ]; then
+        if [ -n "${!v:-}" ]; then
             gappsWrapperArgs+=(--prefix "$v" : "${!v}")
         fi
     done