diff --git a/plugins/post_build.py b/plugins/post_build.py
index cfcd372..cffc47f 100644
--- a/plugins/post_build.py
+++ b/plugins/post_build.py
@@ -1,14 +1,21 @@
 from pelican import signals
 import os
+from plugins.utils import run_command
 
 
 OUTPUT_PATH = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'output')
 
 
 def post_build(*args, **kwargs):
-    os.system("mv {0}/assets/robots.txt {0}".format(OUTPUT_PATH))
-    os.system("cp -R {0}/assets/* {0}/static".format(OUTPUT_PATH))
-    os.system("rm -rf {0}/assets".format(OUTPUT_PATH))
+    run_command('Copying Robots.txt', [
+        'mv', os.path.join(OUTPUT_PATH, 'assets', 'robots.txt'), OUTPUT_PATH
+    ])
+    run_command('Copying Assets', [
+        'cp', '-R', os.path.join(OUTPUT_PATH, 'assets', '*'), os.path.join(OUTPUT_PATH, 'static')
+    ], True)
+    run_command('Remove Old Assets', [
+        'rm', '-rf', os.path.join(OUTPUT_PATH, 'assets')
+    ])
 
 
 def register():
diff --git a/plugins/static_build.py b/plugins/static_build.py
index 4e7e339..8606595 100644
--- a/plugins/static_build.py
+++ b/plugins/static_build.py
@@ -1,6 +1,6 @@
 from pelican import signals
 import os
-import subprocess
+from plugins.utils import node_bin, run_command
 import logging
 
 logger = logging.getLogger(__file__)
@@ -8,30 +8,6 @@ logger = logging.getLogger(__file__)
 NODE_PRODUCTION = os.environ.get('NODE_ENV') == 'production'
 
 
-def flatten_list(array):
-    res = []
-    for el in array:
-        if isinstance(el, (list, tuple)):
-            res.extend(flatten_list(el))
-            continue
-        res.append(el)
-    return res
-
-
-def run_command(detail, args, use_system=False):
-    logger.info(detail + '...')
-    if use_system:
-        exit_code = os.system(' '.join(flatten_list(args)))
-        if exit_code:
-            exit(exit_code)
-    else:
-        subprocess.run(flatten_list(args), check=True)
-
-
-def node_bin(exec):
-    return os.path.join('node_modules', '.bin', exec)
-
-
 def static_build(*args, **kwargs):
     if NODE_PRODUCTION:
         logger.info('Building Production...')
diff --git a/plugins/utils.py b/plugins/utils.py
new file mode 100644
index 0000000..11e3c6f
--- /dev/null
+++ b/plugins/utils.py
@@ -0,0 +1,28 @@
+import subprocess
+import logging
+import os
+
+
+logger = logging.getLogger(__file__)
+
+
+def flatten_list(array):
+    res = []
+    for el in array:
+        if isinstance(el, (list, tuple)):
+            res.extend(flatten_list(el))
+            continue
+        res.append(el)
+    return res
+
+
+def run_command(detail, args, wrap=False):
+    if wrap:
+        run_command('', ['bash', '-c', ' '.join(flatten_list(args))])
+    else:
+        logger.info(detail + '...')
+        subprocess.run(flatten_list(args), check=True)
+
+
+def node_bin(exec):
+    return os.path.join('node_modules', '.bin', exec)