diff --git a/pkgs/maps/shell.nix b/pkgs/maps/shell.nix
index 2820c1b..e585927 100644
--- a/pkgs/maps/shell.nix
+++ b/pkgs/maps/shell.nix
@@ -16,13 +16,34 @@ let
       };
     };
   fennel-ls = pkgs.fennel-ls.override { inherit (package) lua luaPackages; };
+  luaProfiler =
+    let
+      inherit (pkgs) stdenv cmake;
+      inherit (package) lua;
+    in stdenv.mkDerivation {
+      name = "LuaProfiler";
+      src = fetchFromGitHub {
+        owner = "Patrick08T";
+        repo = "LuaProfiler";
+        rev = "abb989337f6f46b820c9d2eb1e1d339e8f6f3760";
+        hash = "sha256-43kwZCZZmWD5ens1qCzD7LTg/jKMfcb9Vw/DBiN2sSo=";
+      };
+      buildInputs = [ lua ];
+      installPhase = ''
+        mkdir -p "$out/lib/lua/${lua.luaversion}"
+        echo cp /build/source/bin/release/libluaperf.so "$out/lib/lua/${lua.luaversion}"
+        cp /build/source/bin/release/libluaperf.so "$out/lib/lua/${lua.luaversion}"
+      '';
+      nativeBuildInputs = [ cmake ];
+    };
 in
 package.overrideAttrs(o: {
-  nativeBuildInputs = [ fennel-ls ] ++ o.nativeBuildInputs;
+  nativeBuildInputs = [ fennel-ls luaProfiler flamegraph  ] ++ o.nativeBuildInputs;
   shellHook = ''
     mkdir -p bin
     ( cd bin && ln -sf `type -p fennel-ls` `type -p fennel` . )
-    export LUA_CPATH=$(lua -e "print(package.cpath)")
+    export LUA_CPATH=$(lua -e "print(package.cpath)")\;${luaProfiler}/lib/lua/${package.lua.luaversion}/\?.so
     export LUA_PATH=$(lua -e "print(package.path)")\;$RXI_JSON/share/lua/5.3/?.lua
+
   '';
 })