diff --git a/pkgs/development/libraries/catch2/default.nix b/pkgs/development/libraries/catch2/default.nix
index bbbf08c6f070..111f1054f368 100644
--- a/pkgs/development/libraries/catch2/default.nix
+++ b/pkgs/development/libraries/catch2/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation rec {
     homepage = "http://catch-lib.net";
     license = licenses.boost;
     maintainers = with maintainers; [ edwtjo knedlsepp ];
-    platforms = with platforms; unix;
+    platforms = platforms.unix ++ [ "x86_64-windows" ];
   };
 }
diff --git a/pkgs/development/libraries/fcppt/default.nix b/pkgs/development/libraries/fcppt/default.nix
index 380fdcce29f3..f9259e23c2b6 100644
--- a/pkgs/development/libraries/fcppt/default.nix
+++ b/pkgs/development/libraries/fcppt/default.nix
@@ -1,19 +1,25 @@
-{ lib, stdenv, fetchFromGitHub, cmake, boost, catch2, metal }:
+{ lib, stdenv, fetchFromGitHub, cmake, boost, catch2 }:
 stdenv.mkDerivation rec {
   pname = "fcppt";
-  version = "3.5.0";
+  version = "4.2.1";
 
   src = fetchFromGitHub {
     owner = "freundlich";
     repo = "fcppt";
     rev = version;
-    sha256 = "045cmn4sym6ria96l4fsc1vrs8l4xrl1gzkmja82f4ddj8qkji2f";
+    sha256 = "1pcmi2ck12nanw1rnwf8lmyx85iq20897k6daxx3hw5f23j1kxv6";
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ boost catch2 metal ];
+  buildInputs = [ boost catch2 ];
 
-  cmakeFlags = [ "-DCMAKE_SKIP_BUILD_RPATH=false" "-DENABLE_BOOST=true" "-DENABLE_EXAMPLES=true" "-DENABLE_CATCH=true" "-DENABLE_TEST=true" ];
+  cmakeFlags = [
+    "-DCMAKE_SKIP_BUILD_RPATH=false"
+    "-DENABLE_BOOST=true"
+    "-DENABLE_EXAMPLES=true"
+    "-DENABLE_CATCH=true"
+    "-DENABLE_TEST=true"
+  ];
 
   meta = with lib; {
     description = "Freundlich's C++ toolkit";
@@ -27,6 +33,6 @@ stdenv.mkDerivation rec {
     homepage = "https://fcppt.org";
     license = licenses.boost;
     maintainers = with maintainers; [ pmiddend ];
-    platforms = platforms.linux;
+    platforms = [ "x86_64-linux" "x86_64-windows" ];
   };
 }
diff --git a/pkgs/development/libraries/metal/default.nix b/pkgs/development/libraries/metal/default.nix
deleted file mode 100644
index 2f43485e05e0..000000000000
--- a/pkgs/development/libraries/metal/default.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, cmake }:
-stdenv.mkDerivation rec {
-  pname = "metal";
-  version = "2.1.2";
-
-  src = fetchFromGitHub {
-    owner = "brunocodutra";
-    repo = "metal";
-    rev = "v${version}";
-    sha256 = "sha256-1I+EZtIz/2y4+dJGBONhTlUQGHgRdvXc1ZAOC9pmStw=";
-  };
-
-  nativeBuildInputs = [ cmake ];
-
-  meta = with lib; {
-    description = "Single-header C++11 library designed to make you love template metaprogramming";
-    homepage = "https://github.com/brunocodutra/metal";
-    license = licenses.mit;
-    maintainers = with maintainers; [ pmiddend ];
-    platforms = platforms.all;
-  };
-
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 7c70c043d580..c8f4cdde0daf 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -865,6 +865,7 @@ mapAliases ({
   mercurial_4 = throw "mercurial_4 has been removed as it's unmaintained"; # Added 2021-10-18
   mesos = throw "mesos has been removed from nixpkgs, as it's unmaintained"; # Added 2020-08-15
   mess = mame; # Added 2019-10-30
+  metal = throw "metal has been removed due to lack of maintainers";
   mididings = throw "mididings has been removed from nixpkgs as it doesn't support recent python3 versions and its upstream stopped maintaining it"; # Added 2022-01-12
   midoriWrapper = throw "'midoriWrapper' has been renamed to/replaced by 'midori'"; # Converted to throw 2022-02-22
   mime-types = mailcap; # Added 2022-01-21
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 44f895c0e448..0a864aa575a5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14247,7 +14247,6 @@ with pkgs;
     coursier = coursier.override { jre = jdk8; };
   };
 
-  metal = callPackage ../development/libraries/metal { };
   metals = callPackage ../development/tools/metals { };
   scalafix = callPackage ../development/tools/scalafix {
     jre = jre8; # TODO: remove override https://github.com/NixOS/nixpkgs/pull/89731