diff --git a/pkgs/shells/bash/bash-4.2-patches.nix b/pkgs/shells/bash/bash-4.2-patches.nix
index e283c23990ee..52392f4b32c6 100644
--- a/pkgs/shells/bash/bash-4.2-patches.nix
+++ b/pkgs/shells/bash/bash-4.2-patches.nix
@@ -40,4 +40,7 @@ patch: [
 (patch "037" "0x0niqv7zwqvz4l8n9nivhk0g0036jh5h3vlkil3095vsgfqqmy7")
 (patch "038" "0mvdpsxxs4bn5zvsm04yfsplhcrv6y0avpwilj5yasr0vwdsijdq")
 (patch "039" "148pkj5s73ym0jhpr8d3z5vfily4chm0am4yms4506ijc0531ygl")
+(patch "040" "0v5a98ybibwsd4iyh18gy0kc51mx8qn9w2wfpjaiycn7yg5gjrdj")
+(patch "041" "1szmm8xv41hvbzgxfwrj6dg85wa7zy3781nnil428rlzpm8ikk05")
+(patch "042" "017kpdqy6v9sgi2a931wyzpix86n9mkalpm6n9cb45v58lgmraps")
 ]
diff --git a/pkgs/shells/bash/default.nix b/pkgs/shells/bash/default.nix
index 6191bb0f148e..c83cb96148b0 100644
--- a/pkgs/shells/bash/default.nix
+++ b/pkgs/shells/bash/default.nix
@@ -48,6 +48,8 @@ stdenv.mkDerivation rec {
     ++ stdenv.lib.optional (texinfo != null) texinfo
     ++ stdenv.lib.optional interactive readline;
 
+  enableParallelBuilding = true;
+
   postInstall = ''
     # Add an `sh' -> `bash' symlink.
     ln -s bash "$out/bin/sh"