diff --git a/pkgs/applications/science/logic/z3/4.4.0.nix b/pkgs/applications/science/logic/z3/4.4.0.nix
new file mode 100644
index 00000000000..1e3bcea42ef
--- /dev/null
+++ b/pkgs/applications/science/logic/z3/4.4.0.nix
@@ -0,0 +1,41 @@
+{ stdenv, fetchFromGitHub, python }:
+
+stdenv.mkDerivation rec {
+  name = "z3-${version}";
+  version = "4.4.0";
+
+  src = fetchFromGitHub {
+    owner  = "Z3Prover";
+    repo   = "z3";
+    rev    = "7f6ef0b6c0813f2e9e8f993d45722c0e5b99e152";
+    sha256 = "1xllvq9fcj4cz34biq2a9dn2sj33bdgrzyzkj26hqw70wkzv1kzx";
+  };
+
+  buildInputs = [ python ];
+  enableParallelBuilding = true;
+
+  configurePhase = "python scripts/mk_make.py --prefix=$out && cd build";
+
+  # z3's install phase is stupid because it tries to calculate the
+  # python package store location itself, meaning it'll attempt to
+  # write files into the nix store, and fail.
+  soext = if stdenv.system == "x86_64-darwin" then ".dylib" else ".so";
+  installPhase = ''
+    mkdir -p $out/bin $out/lib/${python.libPrefix}/site-packages $out/include
+    cp ../src/api/z3*.h       $out/include
+    cp ../src/api/c++/z3*.h   $out/include
+    cp z3                     $out/bin
+    cp libz3${soext}          $out/lib
+    cp libz3${soext}          $out/lib/${python.libPrefix}/site-packages
+    cp z3*.pyc                $out/lib/${python.libPrefix}/site-packages
+    cp ../src/api/python/*.py $out/lib/${python.libPrefix}/site-packages
+  '';
+
+  meta = {
+    description = "A high-performance theorem prover and SMT solver";
+    homepage    = "http://github.com/Z3Prover/z3";
+    license     = stdenv.lib.licenses.mit;
+    platforms   = stdenv.lib.platforms.x86_64;
+    maintainers = with stdenv.lib.maintainers; [ thoughtpolice ttuegel ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 96fead21bfa..c1e75cadc83 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26440,6 +26440,10 @@ in
   };
 
   z3 = callPackage ../applications/science/logic/z3 { python = python2; };
+  z3_4_4_0 = callPackage ../applications/science/logic/z3/4.4.0.nix {
+    python = python2;
+    stdenv = gcc49Stdenv;
+  };
   z3-tptp = callPackage ../applications/science/logic/z3/tptp.nix {};
 
   tlaplus = callPackage ../applications/science/logic/tlaplus {