diff --git a/.config/shell/bin/mkswp b/.config/shell/bin/mkswp
index 7021f26..19b4601 100755
--- a/.config/shell/bin/mkswp
+++ b/.config/shell/bin/mkswp
@@ -2,12 +2,18 @@
 
 # Makes a swapfile at /swapfile of a given size (ex: mkswp 4G)
 
+set -e
+
 if [ -d /swap ]; then
    SWAPFILE=/swap/swapfile
 else
    SWAPFILE=/swapfile
 fi
 
+if [ "$(stat -f -c %T .)" = "btrfs" ]; then
+   :
+fi
+
 sudo fallocate -l "$1" "$SWAPFILE" &&
    sudo chmod 600 "$SWAPFILE"
 sudo mkswap "$SWAPFILE" &&