diff --git a/pkgs/development/interpreters/elixir/generic-builder.nix b/pkgs/development/interpreters/elixir/generic-builder.nix
index 7d3c6476131d..b4e1cacfe267 100644
--- a/pkgs/development/interpreters/elixir/generic-builder.nix
+++ b/pkgs/development/interpreters/elixir/generic-builder.nix
@@ -40,6 +40,8 @@ in
       rm -vf rebar
       ln -s ${rebar}/bin/rebar rebar
 
+      patchShebangs lib/elixir/generate_app.escript || true
+
       substituteInPlace Makefile \
         --replace "/usr/local" $out
     '';