diff --git a/pkgs/by-name/st/sticky/package.nix b/pkgs/by-name/st/sticky/package.nix
index 56c03f2882e0..aaf20f4d3437 100644
--- a/pkgs/by-name/st/sticky/package.nix
+++ b/pkgs/by-name/st/sticky/package.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   ];
 
   preFixup = ''
-    buildPythonPath "$out $pythonPath"
+    buildPythonPath "$out ''${pythonPath[*]}"
 
     gappsWrapperArgs+=(
       --prefix PYTHONPATH : "$program_PYTHONPATH"