diff --git a/pkgs/applications/misc/taskwarrior/unstable.nix b/pkgs/applications/misc/taskwarrior/unstable.nix
deleted file mode 100644
index a50654b28d25..000000000000
--- a/pkgs/applications/misc/taskwarrior/unstable.nix
+++ /dev/null
@@ -1,27 +0,0 @@
-{ 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";
-
-  buildNativeInputs = [ cmake ];
-  buildInputs = [ lua5 ];
-
-  crossAttrs = {
-    preConfigure = ''
-      export NIX_CROSS_LDFLAGS="$NIX_CROSS_LDFLAGS -ldl"
-    '';
-  };
-
-  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 71a961480ef0..e233baa7fe3d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7402,8 +7402,6 @@ let
 
   taskwarrior = callPackage ../applications/misc/taskwarrior { };
 
-  taskwarrior_unstable = callPackage ../applications/misc/taskwarrior/unstable.nix { };
-
   telepathy_gabble = callPackage ../applications/networking/instant-messengers/telepathy/gabble {
     inherit (pkgs.gnome) libsoup;
   };