diff --git a/pkgs/applications/science/logic/minisat/unstable.nix b/pkgs/applications/science/logic/minisat/unstable.nix
new file mode 100644
index 000000000000..f7f5c7a4b78d
--- /dev/null
+++ b/pkgs/applications/science/logic/minisat/unstable.nix
@@ -0,0 +1,23 @@
+{ stdenv, fetchFromGitHub, zlib, cmake }:
+
+stdenv.mkDerivation rec {
+  name = "minisat-unstable-2013-09-25";
+
+  src = fetchFromGitHub {
+    owner = "niklasso";
+    repo = "minisat";
+    rev = "37dc6c67e2af26379d88ce349eb9c4c6160e8543";
+    sha256 = "091hf3qkm197s5r7xcr3m07xsdwyz2rqk1hc9kj0hn13imz09irq";
+  };
+
+  buildInputs = [ zlib ];
+  nativeBuildInputs =  [ cmake ];
+
+  meta = with stdenv.lib; {
+    description = "Compact and readable SAT solver";
+    maintainers = with maintainers; [ Mic92 ];
+    platforms = platforms.unix;
+    license = licenses.mit;
+    homepage = "http://minisat.se/";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d72af8b24c8b..b620608b7d30 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17848,6 +17848,7 @@ with pkgs;
   mcrl2 = callPackage ../applications/science/logic/mcrl2 { };
 
   minisat = callPackage ../applications/science/logic/minisat {};
+  minisatUnstable = callPackage ../applications/science/logic/minisat/unstable.nix {};
 
   opensmt = callPackage ../applications/science/logic/opensmt { };