diff --git a/pkgs/applications/misc/taskwarrior/unstable.nix b/pkgs/applications/misc/taskwarrior/unstable.nix
new file mode 100644
index 00000000000..057ebbe57c5
--- /dev/null
+++ b/pkgs/applications/misc/taskwarrior/unstable.nix
@@ -0,0 +1,20 @@
+{ stdenv, fetchurl, cmake, lua5 }:
+
+stdenv.mkDerivation {
+  name = "task-warrior-2.0.0.beta4";
+
+  src = fetchurl {
+    url = http://www.taskwarrior.org/download/task-2.0.0.beta4.tar.gz;
+    sha256 = "1c9n6b5ly3m5kminnsvqgmjxdkb68w4av9kdnh47dw4sj3gwrn1w";
+  };
+
+  NIX_LDFLAGS = "-ldl";
+
+  buildInputs = [ cmake lua5 ];
+
+  meta = {
+    description = "Command-line todo list manager";
+    homepage = http://taskwarrior.org/;
+    license = "MIT";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9d2c693e163..bbc4a70b948 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7424,6 +7424,8 @@ let
 
   taskwarrior = callPackage ../applications/misc/taskwarrior { };
 
+  taskwarrior_unstable = callPackage ../applications/misc/taskwarrior/unstable.nix { };
+
   tesseract = callPackage ../applications/graphics/tesseract { };
 
   thinkingRock = callPackage ../applications/misc/thinking-rock { };