diff --git a/pkgs/tools/x11/xmcp/default.nix b/pkgs/tools/x11/xmcp/default.nix
new file mode 100644
index 000000000000..178861d63724
--- /dev/null
+++ b/pkgs/tools/x11/xmcp/default.nix
@@ -0,0 +1,33 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, libX11
+}:
+
+stdenv.mkDerivation rec {
+  pname = "xmcp";
+  version = "unstable-2020-10-10";
+
+  src = fetchFromGitHub {
+    owner = "blblapco";
+    repo = "xmcp";
+    rev = "ee56225f1665f9edc04fe5c165809f2fe160a420";
+    sha256 = "sha256-B3YkYrVEg6UJ2ApaVook4N2XvrCboxDMUG5CN9I79Sg=";
+  };
+
+  buildInputs = [ libX11 ];
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm0755 xmcp $out/bin/xmcp
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Tiny color picker for X11";
+    homepage = "https://github.com/blblapco/xmcp";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ azahi ];
+    platforms = platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 851740c63689..1dc934c3919a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -35627,6 +35627,7 @@ with pkgs;
 
   xsos = callPackage ../os-specific/linux/xsos { };
 
+  xmcp = callPackage ../tools/x11/xmcp { };
 
   zk = callPackage ../applications/office/zk {};