diff --git a/flake.nix b/flake.nix
index 45d2dae..cd471a2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,7 +7,7 @@
     let
       inherit (builtins) listToAttrs mapAttrs;
 
-      allPackageNames = [ "d2" "d2plugin-tala" "d2full" ];
+      allPackageNames = [ "d2" "d2plugin-tala" "d2full" "fawltydeps" ];
       mkAllPackages = pkgs':
         let
           d2-unwrapped = pkgs'.callPackage ./pkgs/d2/d2-unwrapped.nix { };
@@ -15,9 +15,10 @@
           d2 = pkgs'.callPackage ./pkgs/d2 {
             inherit d2-unwrapped d2plugin-tala;
           };
+          fawltydeps = pkgs'.callPackage ./pkgs/fawltydeps { };
         in
         {
-          inherit d2 d2plugin-tala;
+          inherit d2 d2plugin-tala fawltydeps;
           d2-full = d2.override { withTala = true; };
         };
 
diff --git a/pkgs/fawltydeps/default.nix b/pkgs/fawltydeps/default.nix
new file mode 100644
index 0000000..2dbc720
--- /dev/null
+++ b/pkgs/fawltydeps/default.nix
@@ -0,0 +1,60 @@
+{ lib
+, poetry2nix
+, fetchFromGitHub
+, python39
+, python39Packages
+}:
+
+let
+  poetryOverrides = poetry2nix.defaultPoetryOverrides.extend (full: prev: {
+    colorama = prev.colorama.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.hatchling ];
+    });
+    iniconfig = prev.iniconfig.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.hatchling prev.hatch-vcs ];
+    });
+    filelock = prev.filelock.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.hatchling prev.hatch-vcs ];
+    });
+    packaging = prev.packaging.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.flit-core ];
+    });
+    pathspec = prev.pathspec.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.flit-core ];
+    });
+    nox = prev.nox.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.setuptools ];
+    });
+    exceptiongroup = prev.exceptiongroup.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ prev.flit-scm ];
+    });
+    mypy = prev.mypy.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs ++ [ full.types-psutil ];
+    });
+    types-psutil = prev.buildPythonPackage rec {
+      pname = "types-psutil";
+      version = "5.9.5";
+
+      src = prev.fetchPypi {
+        inherit version;
+        pname = "types-psutil";
+        sha256 = "sha256-vvkd4Ja3f/e8OpK6/kZu5V+EIobB1zRli3wmslkHglM=";
+      };
+
+      pythonImportsCheck = [ "psutil-stubs" ];
+    };
+  });
+
+  src = fetchFromGitHub {
+    owner = "tweag";
+    repo = "FawltyDeps";
+    rev = "0201e74a158c5774db9150e1e70f01e76bad34e7";
+    sha256 = "sha256-kSAy6IOS+G+e7hG4ZseglhOsnJ7Tg87MaMRCWUoSJdA=";
+  };
+in
+poetry2nix.mkPoetryApplication {
+  version = "2023-03-14";
+  python = python39;
+  projectDir = "${src}";
+  overrides = poetryOverrides;
+}