diff --git a/.github/workflows/black.yaml b/.github/workflows/black.yaml
index 31d5a4b..5a30bdb 100644
--- a/.github/workflows/black.yaml
+++ b/.github/workflows/black.yaml
@@ -12,4 +12,4 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - run: python3 -m pip install --user black==24.4.2
-      - run: python3 -m black .
+      - run: python3 -m black . --check
diff --git a/mwccgap/compiler.py b/mwccgap/compiler.py
index 1415b4a..03ccfd7 100644
--- a/mwccgap/compiler.py
+++ b/mwccgap/compiler.py
@@ -1,4 +1,3 @@
-import os
 import subprocess
 import sys
 import tempfile
@@ -48,7 +47,6 @@ def _compile_file(
             stdout=subprocess.PIPE,
             stdin=subprocess.PIPE,
             stderr=subprocess.PIPE,
-            env=dict(os.environ, MWCIncludes="."),  # TODO: remove this?
         ) as proc:
             return proc.communicate()
 
diff --git a/mwccgap/constants.py b/mwccgap/constants.py
index f03547d..124eb9e 100644
--- a/mwccgap/constants.py
+++ b/mwccgap/constants.py
@@ -14,6 +14,4 @@
 
 LOCAL_SUFFIX = ", local"
 
-IGNORED_RELOCATIONS = (
-    ".rel.pdr",
-)
+IGNORED_RELOCATIONS = (".rel.pdr",)
diff --git a/mwccgap/mwccgap.py b/mwccgap/mwccgap.py
index 0152001..ff607fd 100755
--- a/mwccgap/mwccgap.py
+++ b/mwccgap/mwccgap.py
@@ -180,8 +180,9 @@ def process_c_file(
             rel_rodata_sh_name = compiled_elf.add_sh_symbol(".rel.rodata")
 
         relocation_records = [
-            record for record in assembled_elf.get_relocations()
-                if record.name not in IGNORED_RELOCATIONS
+            record
+            for record in assembled_elf.get_relocations()
+            if record.name not in IGNORED_RELOCATIONS
         ]
         assert (
             len(relocation_records) < 3