diff --git a/setup.py b/setup.py
index 93e9d61..743078a 100644
--- a/setup.py
+++ b/setup.py
@@ -196,7 +196,9 @@ def run(self):
 
         # Build a static binary on Windows to avoid missing DLLs from MinGW,
         # i.e., libgcc_s_seh-1.dll, libstdc++-6.dll, etc.
-        BUILD_STATIC = "linux-musl" in os.environ.get("CC", "") or "linux-musl" in os.environ.get("CXX", "")
+        BUILD_STATIC = "linux-musl" in os.environ.get(
+            "CC", ""
+        ) or "linux-musl" in os.environ.get("CXX", "")
 
         if BUILD_STATIC:
             ldflags.append("-extldflags '-static'")