diff --git a/pygomx-module/build_ffi.py b/pygomx-module/build_ffi.py
index 15d9267..5e0d938 100644
--- a/pygomx-module/build_ffi.py
+++ b/pygomx-module/build_ffi.py
@@ -10,7 +10,7 @@ lib_list = [
 # keep defaults in sync with setup.py
 if (
     os.getenv("PYGOMX_BUILD_MODE", "static") == "static"
-    and os.getenv("PYGOMX_OLM_FLAVOR", colm) == "colm"
+    and os.getenv("PYGOMX_OLM_FLAVOR", "colm") == "colm"
 ):
     lib_list += ["olm"]
 
diff --git a/pygomx-module/setup.py b/pygomx-module/setup.py
index dbbc7ae..506b9db 100644
--- a/pygomx-module/setup.py
+++ b/pygomx-module/setup.py
@@ -47,11 +47,11 @@ class CustomCommand(Command):
         go_call = [
             "go",
             "build",
-            f"-buildmode=${build_mode_name}",
+            f"-buildmode={build_mode_name}",
             "-tags",
             ",".join(go_tags),
             "-o",
-            f"../pygomx-module/libmxclient${build_mode_ext}",
+            f"../pygomx-module/libmxclient{build_mode_ext}",
             ".",
         ]
         subprocess.call(go_call, cwd="../libmxclient")