diff --git a/pkgs/by-name/fi/fio/package.nix b/pkgs/by-name/fi/fio/package.nix
index a5fd7b26072c..4450b03001df 100644
--- a/pkgs/by-name/fi/fio/package.nix
+++ b/pkgs/by-name/fi/fio/package.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
   ];
 
   postInstall = ''
-    wrapPythonProgramsIn "$out/bin" "$out $pythonPath"
+    wrapPythonProgramsIn "$out/bin" "$out ''${pythonPath[*]}"
   '';
 
   meta = {