pythonPackages.jishaku: patch hardcoded /bin/bash default to /bin/sh

Co-Authored-By: a-n-n-a-l-e-e

pkgs/development/python-modules/jishaku/default.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  bash,
   buildPythonPackage,
   fetchFromGitHub,
   fetchpatch,
@@ -33,6 +34,11 @@ buildPythonPackage rec {
     })
   ];
 
+  postPatch = ''
+    substituteInPlace jishaku/shell.py \
+      --replace-fail '"/bin/bash"' '"${lib.getExe bash}"'
+  '';
+
   nativeBuildInputs = [ setuptools ];
 
   propagatedBuildInputs = [