diff --git a/flake.nix b/flake.nix
index 869ffc9..478e9ad 100644
--- a/flake.nix
+++ b/flake.nix
@@ -64,45 +64,6 @@
           ];
         };
 
-        packages.am-kernels = pkgs.stdenv.mkDerivation rec {
-          pname = "am-kernels";
-          version = "2024.02.18";
-
-          buildInputs = with pkgs; [
-            SDL2
-          ];
-
-          src = pkgs.fetchFromGitHub {
-            owner = "NJU-ProjectN";
-            repo = "am-kernels";
-            rev = "bb725d6f8223dd7de831c3b692e8c4531e9d01af";
-            hash = "sha256-ZHdrw28TN8cMvhhzM469OV7cp0Yp+8yao855HP4+P4A=";
-          };
-
-          AM_HOME = pkgs.fetchFromGitHub {
-            owner = "xinyangli";
-            repo = "abstract-machine";
-            rev = "788595aac61c6b2f3b78ca8aa7d08dc33911bca4";
-            hash = "sha256-YvWHIBP9tz3HL2TyibftvvQrpkWUDPnviCF4oyLmdjg=";
-          };
-
-          ARCH = "native";
-
-          patchPhase = ''
-            sed -i 's/\/bin\/echo/echo/' tests/cpu-tests/Makefile
-          '';
-
-          buildPhase = ''
-            AS=$CC make -C tests/cpu-tests BUILD_DIR=$(pwd)/build ARCH=$ARCH
-          '';
-
-          installPhase = ''
-            mkdir -p $out/bin
-            rm -r build/native/src build/native/tests
-            cp -r build/native/* $out/bin/
-          '';
-        };
-
         packages.am-kernels-rv32 = crossPkgs.stdenv.mkDerivation rec {
           pname = "am-kernels-rv32";
           version = "2024.02.18";
@@ -157,16 +118,6 @@
             self.packages.${system}.nemu
           ];
         };
-
-        devShells.abstract-machine-shell = pkgs.mkShell {
-          packages = with pkgs; [
-            clang-tools
-            cmake
-            check
-            pkg-config
-            SDL2
-          ];
-        };
       }
     );
 }