Work around hard-coded /usr/bin/nroff' in configure'.

svn path=/nixpkgs/trunk/; revision=25533

pkgs/development/libraries/libedit/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses}:
+{ stdenv, fetchurl, ncurses, groff }:
 
 stdenv.mkDerivation rec {
   name = "libedit-20100424-3.0";
@@ -8,6 +8,9 @@ stdenv.mkDerivation rec {
     sha256 = "11hxaq58gym7kqccjhxywjxdibffzg545z1aj997y1dn0rckhav0";
   };
 
+  # Have `configure' avoid `/usr/bin/nroff' in non-chroot builds.
+  NROFF = "${groff}/bin/nroff";
+
   postInstall = ''
     sed -i s/-lncurses/-lncursesw/g $out/lib/pkgconfig/libedit.pc
   '';