diff --git a/pkgs/development/tools/build-managers/cmake/default.nix b/pkgs/development/tools/build-managers/cmake/default.nix
index 081313972df4..c7484ee6e84b 100644
--- a/pkgs/development/tools/build-managers/cmake/default.nix
+++ b/pkgs/development/tools/build-managers/cmake/default.nix
@@ -7,7 +7,7 @@ with stdenv.lib;
 let
   os = stdenv.lib.optionalString;
   majorVersion = "2.8";
-  minorVersion = "5";
+  minorVersion = "4";
   version = "${majorVersion}.${minorVersion}";
 in
 
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}files/v${majorVersion}/cmake-${version}.tar.gz";
-    sha256 = "148bxnn5msl1zg366cdgxy2inzjj0n4jlhakymj6qr81bzvvy62y";
+    sha256 = "1k2kjaj3vfifb329ff7fr4hcbpbaqb66l97pshq70h7m0zwajznr";
   };
 
   patches =