diff --git a/pkgs/development/python-modules/bitsandbytes/default.nix b/pkgs/development/python-modules/bitsandbytes/default.nix
index c511f01d6dcf..189b8a9c6c27 100644
--- a/pkgs/development/python-modules/bitsandbytes/default.nix
+++ b/pkgs/development/python-modules/bitsandbytes/default.nix
@@ -12,7 +12,7 @@
 
 let
   pname = "bitsandbytes";
-  version = "0.41.0";
+  version = "0.42.0";
 
   inherit (torch) cudaCapabilities cudaPackages cudaSupport;
   inherit (cudaPackages) backendStdenv cudaVersion;
@@ -43,15 +43,15 @@ let
 in
 buildPythonPackage {
   inherit pname version;
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "TimDettmers";
-    repo = pname;
+    repo = "bitsandbytes";
     rev = "refs/tags/${version}";
-    hash = "sha256-e6SK2ylITookO6bhpfdRp/V4y2S9rk6Lo1PD3xXrcmM=";
+    hash = "sha256-PZxsFJ6WpfeQqRQrRRBZfZfNY6/TfJFLBeknX24OXcU=";
   };
 
   postPatch = ''
@@ -73,8 +73,16 @@ buildPythonPackage {
   else
     ''make CUDA_VERSION=CPU cpuonly'';
 
-  nativeBuildInputs = [ setuptools wheel ] ++ lib.optionals torch.cudaSupport [ cuda-native-redist ];
-  buildInputs = lib.optionals torch.cudaSupport [ cuda-redist ];
+  nativeBuildInputs = [
+    setuptools
+    wheel
+  ] ++ lib.optionals torch.cudaSupport [
+    cuda-native-redist
+  ];
+
+  buildInputs = lib.optionals torch.cudaSupport [
+    cuda-redist
+  ];
 
   propagatedBuildInputs = [
     scipy
@@ -88,8 +96,9 @@ buildPythonPackage {
   ];
 
   meta = with lib; {
-    homepage = "https://github.com/TimDettmers/bitsandbytes";
     description = "8-bit CUDA functions for PyTorch";
+    homepage = "https://github.com/TimDettmers/bitsandbytes";
+    changelog = "https://github.com/TimDettmers/bitsandbytes/releases/tag/${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ bcdarwin ];
   };
diff --git a/pkgs/development/python-modules/openllm-client/default.nix b/pkgs/development/python-modules/openllm-client/default.nix
index a1cc4fcc921e..7c0c1d80fc5b 100644
--- a/pkgs/development/python-modules/openllm-client/default.nix
+++ b/pkgs/development/python-modules/openllm-client/default.nix
@@ -23,6 +23,12 @@ buildPythonPackage rec {
 
   sourceRoot = "source/openllm-client";
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail "hatchling==1.18.0" "hatchling" \
+      --replace-fail "hatch-vcs==0.3.0" "hatch-vcs"
+  '';
+
   nativeBuildInputs = [
     hatch-fancy-pypi-readme
     hatch-vcs