diff --git a/src/args/make-python-environment/default.nix b/src/args/make-python-environment/default.nix
index 29ce32b9..fa67a3ef 100644
--- a/src/args/make-python-environment/default.nix
+++ b/src/args/make-python-environment/default.nix
@@ -7,7 +7,7 @@
   pythonProjectDir,
   pythonVersion,
   preferWheels ? true,
-  overrides ? (self: super: {}),
+  overrides ? {},
 }: let
   poetry2nix = let
     commit = "528d500ea826383cc126a9be1e633fc92b19ce5d";
@@ -18,29 +18,6 @@
     };
   in
     import src {pkgs = __nixpkgs__;};
-  getPoetryPackages = let
-    tomlPath = "${pythonProjectDir}/poetry.lock";
-    tomlData = builtins.fromTOML (builtins.readFile tomlPath);
-    tomlPackages = tomlData.package;
-    packagesNames = builtins.map (pkg: pkg.name) tomlPackages;
-    extraPackagesLst = builtins.concatLists (builtins.map (
-        pkg:
-          if builtins.hasAttr "extras" pkg
-          then
-            builtins.concatLists (
-              builtins.attrValues pkg.extras
-            )
-          else []
-      )
-      tomlPackages);
-    extraPackagesNames =
-      builtins.map (
-        extra:
-          builtins.toString (builtins.head (builtins.split " " (__nixpkgs__.lib.toLower extra)))
-      )
-      extraPackagesLst;
-  in
-    packagesNames ++ extraPackagesNames;
 
   is39 = pythonVersion == "3.9";
   is310 = pythonVersion == "3.10";
@@ -55,35 +32,60 @@
     }
     .${pythonVersion};
 
-  overrideWithHome = pkg: super:
-    super.${pkg}.overridePythonAttrs (
-      old: {
-        preUnpack =
-          ''
-            export HOME=$(mktemp -d)
-            rm -rf /homeless-shelter
-          ''
-          + (old.preUnpack or "");
-      }
-    );
-  tomlOverrides = self: super:
-    builtins.listToAttrs (
+  overridenPackages = self: super: let
+    overridePackageHome = pkg: super:
+      super.${pkg}.overridePythonAttrs (
+        old: {
+          preUnpack =
+            ''
+              export HOME=$(mktemp -d)
+              rm -rf /homeless-shelter
+            ''
+            + (old.preUnpack or "");
+        }
+      );
+    packages = let
+      lock = "${pythonProjectDir}/poetry.lock";
+      data = builtins.fromTOML (builtins.readFile lock);
+      main = builtins.map (pkg: pkg.name) data.package;
+      extras = let
+        list = builtins.concatLists (
+          builtins.map (
+            pkg:
+              if builtins.hasAttr "extras" pkg
+              then builtins.concatLists (builtins.attrValues pkg.extras)
+              else []
+          )
+          data.package
+        );
+        names =
+          builtins.map (
+            extra:
+              builtins.toString (
+                builtins.head (
+                  builtins.split " " (__nixpkgs__.lib.toLower extra)
+                )
+              )
+          )
+          list;
+      in
+        names;
+    in
+      main ++ extras;
+    overridenHomes = builtins.listToAttrs (
       builtins.map (
         pkg: {
           name = pkg;
-          value = overrideWithHome pkg super;
+          value = overridePackageHome pkg super;
         }
       )
-      getPoetryPackages
+      packages
     );
-  combinedOverrides = self: super: let
-    toml = tomlOverrides self super;
-    orig = overrides self super;
   in
-    toml // orig;
+    overridenHomes // (overrides self super);
 
   env = poetry2nix.mkPoetryEnv {
-    overrides = poetry2nix.defaultPoetryOverrides.extend combinedOverrides;
+    overrides = poetry2nix.defaultPoetryOverrides.extend overridenPackages;
     inherit preferWheels;
     projectDir = pythonProjectDir;
     inherit python;