--- a/bazel/generate_cc.bzl
+++ b/bazel/generate_cc.bzl
@@ -141,6 +141,7 @@ def generate_cc_impl(ctx):
         outputs = out_files,
         executable = ctx.executable._protoc,
         arguments = arguments,
+        use_default_shell_env = True,
     )

     return struct(files = depset(out_files))