diff --git a/hosts/_iso/configuration.nix b/hosts/_iso/configuration.nix
index 937276a..97cab1e 100644
--- a/hosts/_iso/configuration.nix
+++ b/hosts/_iso/configuration.nix
@@ -10,7 +10,7 @@ let
     echo "[I] Deploying with hostname ''${hostname}"
 
     device=""
-    for dev in ("/dev/vda" "/dev/sda"); do
+    for dev in "/dev/vda" "/dev/sda"; do
       if [[ -b $dev ]]; then
         device=$dev
         break
@@ -60,7 +60,7 @@ let
 
     nixfiles-generate-config --root /mnt --hostname ''${hostname}
 
-    sed -i "s/\# boot\.loader\.grub\.device = \"/dev/sda\";/boot\.loader\.grub\.device = \"''${device}\";/g" /mnt/etc/nixos/hosts/''${hostname}/configuration.nix
+    sed -i "s~# boot\.loader\.grub\.device = \"/dev/sda\";~boot\.loader\.grub\.device = \"''${device}\";~g" /mnt/etc/nixos/hosts/''${hostname}/configuration.nix
 
     echo "[I] Install NixOS"