diff --git a/pkgs/development/libraries/gmp/default.nix b/pkgs/development/libraries/gmp/default.nix
index e414a5f2a734..e2f8a900bda3 100644
--- a/pkgs/development/libraries/gmp/default.nix
+++ b/pkgs/development/libraries/gmp/default.nix
@@ -1,11 +1,11 @@
 {stdenv, fetchurl, m4, cxx ? true}:
 
 stdenv.mkDerivation rec {
-  name = "gmp-5.0.0";
+  name = "gmp-5.0.1";
 
   src = fetchurl {
     url = "mirror://gnu/gmp/${name}.tar.bz2";
-    sha256 = "0kwqhyvw48yzxjp29c721m9v498115dh6li9adk7b84mbh7gv2gh";
+    sha256 = "1yrr14l6vvhm1g27y8nb3c75j0i4ii4k1gw7ik08safk3zq119m2";
   };
 
   buildNativeInputs = [m4];
diff --git a/pkgs/development/libraries/ppl/default.nix b/pkgs/development/libraries/ppl/default.nix
index ed4cc7f24978..d681fa44cf95 100644
--- a/pkgs/development/libraries/ppl/default.nix
+++ b/pkgs/development/libraries/ppl/default.nix
@@ -1,12 +1,12 @@
 { fetchurl, stdenv, gmpxx, perl, gnum4 }:
 
-let version = "0.10.2"; in
+let version = "0.11pre24"; in
   stdenv.mkDerivation rec {
     name = "ppl-${version}";
 
     src = fetchurl {
-      url = "ftp://ftp.cs.unipr.it/pub/ppl/releases/${version}/${name}.tar.bz2";
-      sha256 = "0xz2f3lny4l9ji1ilg6pxv34sh4cbh535cnm68smynzp01wgnh7y";
+      url = "ftp://ftp.cs.unipr.it/pub/ppl/snapshots/${version}/${name}.tar.bz2";
+      sha256 = "1w6v5wxj13mnp311aaglhdyzxlx13g84054bsp7sym3ryjjyg0gx";
     };
 
     buildInputs = [ perl gnum4 ];