diff --git a/nix/testenv.nix b/nix/testenv.nix
index cfea53706f..da026238b1 100644
--- a/nix/testenv.nix
+++ b/nix/testenv.nix
@@ -14,9 +14,10 @@ poetry2nix.mkPoetryEnv {
         flake8-isort = [ "hatchling" ];
         pyunormalize = [ "setuptools" ];
         eth-bloom = [ "setuptools" ];
-        ckzg = [ "setuptools" ];
+        ckzg = [ "setuptools" "clang" ];
         aiohappyeyeballs = [ "poetry" ];
         docker = [ "hatchling" "hatch-vcs" ];
+        clang = [ "setuptools" ];
       };
     in
     lib.mapAttrs
diff --git a/tests/integration_tests/poetry.lock b/tests/integration_tests/poetry.lock
index 40dac9f347..f38c78b91d 100644
--- a/tests/integration_tests/poetry.lock
+++ b/tests/integration_tests/poetry.lock
@@ -585,6 +585,17 @@ files = [
     {file = "ckzg-1.0.2.tar.gz", hash = "sha256:4295acc380f8d42ebea4a4a0a68c424a322bb335a33bad05c72ead8cbb28d118"},
 ]
 
+[[package]]
+name = "clang"
+version = "17.0.6"
+description = "libclang python bindings"
+optional = false
+python-versions = "*"
+files = [
+    {file = "clang-17.0.6-py3-none-any.whl", hash = "sha256:d05ad6dddc9b360e94b9420e239c639a9117902cce8a57fd288a5226eea3092e"},
+    {file = "clang-17.0.6.tar.gz", hash = "sha256:d228511e6a29e866dcbe99e10ed10649317b9b3e636ba805f6867b7afb6e8c44"},
+]
+
 [[package]]
 name = "click"
 version = "8.1.7"
@@ -2640,4 +2651,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "cab4c5d038e652dbe241332bc26ae04136f4f662d130113bd3d251bba36497ab"
+content-hash = "ec743921643323bb5dc559246669f0aae5dcc77735d171392e513b2cb4b65126"
diff --git a/tests/integration_tests/pyproject.toml b/tests/integration_tests/pyproject.toml
index 097eae3f50..a0691cf175 100644
--- a/tests/integration_tests/pyproject.toml
+++ b/tests/integration_tests/pyproject.toml
@@ -31,6 +31,7 @@ pytest-timeout = "^2.3.1"
 hatchling = "^1.25.0"
 hatch-vcs = "^0.4.0"
 rpds-py = "^0.17.1"
+clang = "^17.0.6"
 
 [tool.poetry.dev-dependencies]