diff --git a/lib/sysgeneral.py b/lib/sysgeneral.py
index 467b3e5b..6208e2bd 100644
--- a/lib/sysgeneral.py
+++ b/lib/sysgeneral.py
@@ -131,9 +131,9 @@ this script the next time")
         else:
             raise TypeError("url must be either a string or a list of strings")
         # Install base files
-        for i, _ in enumerate(urls):
+        for i, uri in enumerate(urls):
             # Download files into cache directory
-            self.download_file(urls[i], outputs[i])
+            self.download_file(uri, outputs[i])
 
     def make_initramfs(self):
         """Package binary bootstrap seeds and sources into initramfs."""
diff --git a/sysa/mes-0.24/mes-0.24.kaem b/sysa/mes-0.24/mes-0.24.kaem
index 3a95abc0..f85043f8 100755
--- a/sysa/mes-0.24/mes-0.24.kaem
+++ b/sysa/mes-0.24/mes-0.24.kaem
@@ -34,6 +34,9 @@ cp ../files/config.h ${MES_PREFIX}/include/mes
 
 cd ${MES_PREFIX}
 
+# Remove pregenerated files
+rm mes/module/mes/psyntax.pp mes/module/mes/psyntax.pp.header
+
 # These files are symlinked in the repo
 cp mes/module/srfi/srfi-9-struct.mes mes/module/srfi/srfi-9.mes
 cp mes/module/srfi/srfi-9/gnu-struct.mes mes/module/srfi/srfi-9/gnu.mes