diff --git a/flake.nix b/flake.nix
index bd05152..5c75158 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,6 +37,8 @@
         unxwb = callPackage ./unxwb { };
 
         VisiCut = callPackage ./VisiCut { };
+
+        x264-unstable = prev.x264.overrideAttrs (callPackage ./x264-unstable { });
       };
   } // flake-utils.lib.eachDefaultSystem (system:
     let
@@ -61,11 +63,12 @@
         (n: v: lib.elem system v.meta.platforms)
         (flake-utils.lib.flattenTree {
           inherit (pkgs)
+            VisiCut
             cyanrip
             deemix
             textidote
             unxwb
-            VisiCut;
+            x264-unstable;
 
           mpvScripts = lib.recurseIntoAttrs {
             inherit (pkgs.mpvScripts)
diff --git a/x264-unstable/default.nix b/x264-unstable/default.nix
new file mode 100644
index 0000000..07e0e54
--- /dev/null
+++ b/x264-unstable/default.nix
@@ -0,0 +1,18 @@
+{ lib, fetchFromGitLab }:
+
+o: o // rec {
+  version = "unstable-2021-04-19";
+
+  src = fetchFromGitLab {
+    domain = "code.videolan.org";
+    owner = "videolan";
+    repo = o.pname;
+    rev = "b684ebe04a6f80f8207a57940a1fa00e25274f81";
+    sha256 = "06r6m1v88m532wbhk6al9imrsn1inwdjzrpmp97wrbdg6b2naygd";
+  };
+
+  meta = with lib; o.meta // {
+    description = "${o.meta.description} (unstable version)";
+    maintainers = with maintainers; [ sbruder ];
+  };
+}