diff --git a/parm/wflow/coldstart.yaml b/parm/wflow/coldstart.yaml
index ac319f7cf..1770367f1 100644
--- a/parm/wflow/coldstart.yaml
+++ b/parm/wflow/coldstart.yaml
@@ -85,7 +85,7 @@ metatask_run_ensemble:
     mem: '{% if global.DO_ENSEMBLE %}{%- for m in range(1, global.NUM_ENS_MEMBERS+1) -%}{{ "%03d "%m }}{%- endfor -%} {% else %}{{ "000"|string }}{% endif %}'
   task_make_ics_mem#mem#:
     <<: *default_task
-    command: !cycstr 'source &USHdir;/load_modules_wflow.sh hera ; python &SCRIPTSdir;/chgres_cube.py
+    command: !cycstr 'source &USHdir;/load_modules_wflow.sh {{ user.MACHINE }} ; python &SCRIPTSdir;/chgres_cube.py
       -c &GLOBAL_VAR_DEFNS_FP;
       --cycle @Y-@m-@dT@H:@M:@S
       --key-path task_make_ics
@@ -128,7 +128,7 @@ metatask_run_ensemble:
 
   task_make_lbcs_mem#mem#:
     <<: *default_task
-    command: !cycstr 'source &USHdir;/load_modules_wflow.sh hera ; python &SCRIPTSdir;/chgres_cube.py
+    command: !cycstr 'source &USHdir;/load_modules_wflow.sh {{ user.MACHINE }} ; python &SCRIPTSdir;/chgres_cube.py
       -c &GLOBAL_VAR_DEFNS_FP;
       --cycle @Y-@m-@dT@H:@M:@S
       --key-path task_make_lbcs
diff --git a/scripts/chgres_cube.py b/scripts/chgres_cube.py
index 6be8ccc65..5a952a03a 100644
--- a/scripts/chgres_cube.py
+++ b/scripts/chgres_cube.py
@@ -21,10 +21,8 @@
 def _parse_var_defns(file):
     var_dict = {}
     with open(file, "r", encoding="utf-8") as f:
-        lines = f.readlines()
-        for line in lines:
-            line = line.strip()
-            if "=" in line:
+        for line in f:
+            if "=" in line.strip():
                 key, value = line.split("=", 1)
                 key = key.strip()
                 value = value.strip()