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-rw-r--r--pkgs/development/libraries/kde-frameworks/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/kde-frameworks/default.nix b/pkgs/development/libraries/kde-frameworks/default.nix
index ef1171b1760..aa9f95eebd3 100644
--- a/pkgs/development/libraries/kde-frameworks/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/default.nix
@@ -42,7 +42,7 @@ let
       propagate = out:
         let setupHook = { writeScript }:
               writeScript "setup-hook" ''
-                if [ "$hookName" != postHook ]; then
+                if [ "${hookName:-}" != postHook ]; then
                     postHooks+=("source @dev@/nix-support/setup-hook")
                 else
                     # Propagate $dev so that this setup hook is propagated