Add coreutils-prefixed to install coreutils as gls, ggrep, etc.

Close #11421. Amended by vcunat not to cause a stdenv rebuild.

pkgs/tools/misc/coreutils/default.nix

@@ -2,6 +2,7 @@
 , aclSupport ? false, acl ? null
 , selinuxSupport? false, libselinux ? null, libsepol ? null
 , autoconf, automake114x, texinfo
+, withPrefix ? false
 }:
 
 assert aclSupport -> acl != null;
@@ -83,6 +84,17 @@ let
 
     makeFlags = optionalString stdenv.isDarwin "CFLAGS=-D_FORTIFY_SOURCE=0";
 
+    # e.g. ls -> gls; grep -> ggrep
+    postFixup = # feel free to simplify on a mass rebuild
+      if withPrefix then
+      ''
+        (
+          cd "$out/bin"
+          find * -type f -executable -exec mv {} g{} \;
+        )
+      ''
+      else null;
+
     meta = {
       homepage = http://www.gnu.org/software/coreutils/;
       description = "The basic file, shell and text manipulation utilities of the GNU operating system";

pkgs/top-level/all-packages.nix

@@ -1151,6 +1151,8 @@ let
     aclSupport = stdenv.isLinux;
   };
 
+  coreutils-prefixed = coreutils.override { withPrefix = true; };
+
   cpio = callPackage ../tools/archivers/cpio { };
 
   crackxls = callPackage ../tools/security/crackxls { };