diff --git a/pkgs/development/libraries/grantlee/5/default.nix b/pkgs/development/libraries/grantlee/5/default.nix
index 13c350f2ecf9..6fae90a8d890 100644
--- a/pkgs/development/libraries/grantlee/5/default.nix
+++ b/pkgs/development/libraries/grantlee/5/default.nix
@@ -21,9 +21,8 @@ mkDerivation rec {
   postFixup =
     # Disabuse CMake of the notion that libraries are in $dev
     ''
-      for mod in $dev/lib/cmake/Grantlee5/GrantleeTargets-*.cmake; do
-          sed -i $mod -e "s|\''${_IMPORT_PREFIX}|$out|"
-      done
+      sed -i $dev/lib/cmake/Grantlee5/GrantleeTargets-release.cmake \
+          -e "s|\''${_IMPORT_PREFIX}|$out|"
     '';
 
   setupHook = ./setup-hook.sh;