get recode testsuite running.

pkgs/tools/text/recode/default.nix

@@ -1,4 +1,6 @@
-{stdenv, fetchgit}:
+# XXX: this may need -liconv on non-glibc systems.. 
+
+{stdenv, fetchgit, python, perl}:
 
 stdenv.mkDerivation rec {
   name = "recode-3.7-pff85fdbd";
@@ -9,6 +11,14 @@ stdenv.mkDerivation rec {
     sha256 = "1xhlfmqld6af16l444jli9crj9brym2jihg1n6lkxh2gar68f5l7";
   };
 
+  buildInputs = [ python perl ];
+
+  doCheck = true;
+
+  preCheck = ''
+    checkFlagsArray=(LDFLAGS="-L../src/.libs -Wl,-rpath=../src/.libs")
+  '';
+
   meta = {
     homepage = "http://www.gnu.org/software/recode/";
     description = "Converts files between various character sets and usages";