diff --git a/pkgs/shells/bash/builder.sh b/pkgs/shells/bash/builder.sh
deleted file mode 100644
index 56ca1745dae..00000000000
--- a/pkgs/shells/bash/builder.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-source $stdenv/setup
-genericBuild
-cd $out/bin
-ln -s bash sh
diff --git a/pkgs/shells/bash/default.nix b/pkgs/shells/bash/default.nix
index 17e71f2fcc2..be22f045cd9 100644
--- a/pkgs/shells/bash/default.nix
+++ b/pkgs/shells/bash/default.nix
@@ -2,12 +2,14 @@
 
 stdenv.mkDerivation {
   name = "bash-3.2";
-  builder = ./builder.sh;
+
   src = fetchurl {
     url = http://ftp.gnu.org/pub/gnu/bash/bash-3.2.tar.gz;
     md5 = "00bfa16d58e034e3c2aa27f390390d30";
   };
 
+  postInstall = "ln -s bash $out/bin/sh";
+
   patches = [
     # Fix a nasty bug in bash-3.2.
     ./bash32-001.patch