diff --git a/deploy/dev/build.py b/deploy/dev/build.py
index 5b86df2..442c914 100644
--- a/deploy/dev/build.py
+++ b/deploy/dev/build.py
@@ -67,7 +67,9 @@ def discover_targets():
         if service_type not in ("api", "rpc", "mq", "adapter"):
             continue
         go_files = glob(os.path.join(service_dir, "*.go"))
-        if not go_files or not any("package main" in open(f).read() for f in go_files):
+        if not go_files or not any(
+            "package main" in Path(f).read_text(encoding="utf-8") for f in go_files
+        ):
             continue
 
         yamls = glob(os.path.join(service_dir, "etc", "*.yaml"))