fix: mark broken for ci

pkgs/abstract-machine/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, stdenvNoCC
+, fetchFromGitHub
+, pkgsCross
+, gnumake
+, isa ? "riscv32e"
+, platform ? "nemu"
+}:
+
+let 
+  isa_mapping = {
+    riscv32e = "riscv64";
+  };
+in stdenvNoCC.mkDerivation rec {
+  pname = "abstract-machine";
+  version = "2023-08-29";
+
+  src = fetchFromGitHub {
+    owner = "NJU-ProjectN";
+    repo = "abstract-machine";
+    rev = "3348db971fd860be5cb28e21c18f9d0e65d0c96a";
+    hash = "sha256-jZVivawwHXw5WCrHm5vOb9nDBqK6BFVer8Zec0/oZvc=";
+  };
+
+  nativeBuildInputs = [
+    gnumake
+    pkgsCross.${isa_mapping.${isa}}.gcc
+  ];
+
+  SRCS = src;
+  AM_HOME = src;
+  ARCH = "${isa}-${platform}";
+  MAKECMDGOALS = "image";
+
+  meta = with lib; {
+    description = "A minimal, modularized, and machine-independent hardware abstraction layer";
+    homepage = "https://github.com/NJU-ProjectN/abstract-machine.git";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+    broken = true;
+  };
+}