From 424dc0138d45c63ae7c71a0a09778dcb67aea7e3 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 13 Jun 2017 22:28:05 +0200
Subject: [PATCH] parallel: fix broken shebangs to /usr/bin/perl

Adding perl to buildInputs accomplishes this for us automatically.
---
 pkgs/tools/misc/parallel/default.nix | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/pkgs/tools/misc/parallel/default.nix b/pkgs/tools/misc/parallel/default.nix
index 08c672b5612..8097902b0d9 100644
--- a/pkgs/tools/misc/parallel/default.nix
+++ b/pkgs/tools/misc/parallel/default.nix
@@ -8,11 +8,9 @@ stdenv.mkDerivation rec {
     sha256 = "0afk1q8mqzz02h6imyykgi9gwk5gj08hzs6lwgd65ilj4slkh93s";
   };
 
-  nativeBuildInputs = [ makeWrapper ];
-
-  preFixup = ''
-    sed -i 's,#![ ]*/usr/bin/env[ ]*perl,#!${perl}/bin/perl,' $out/bin/*
+  nativeBuildInputs = [ makeWrapper perl ];
 
+  postInstall = ''
     wrapProgram $out/bin/parallel \
       ${if stdenv.isLinux then ("--prefix PATH \":\" ${procps}/bin") else ""} \
       --prefix PATH : "${perl}/bin" \