diff --git a/mkarchroot b/mkarchroot
index 22697ca..2a02196 100755
--- a/mkarchroot
+++ b/mkarchroot
@@ -65,7 +65,7 @@ function chroot_mount ()
     [ -e "${working_dir}/var/cache/pacman" ] || mkdir -p "${working_dir}/var/cache/pacman"
     mount -o bind /var/cache/pacman "${working_dir}/var/cache/pacman"
 
-    trap 'chroot_umount' 1 2 15
+    trap 'chroot_umount' 0 1 2 15
 }
 
 function chroot_umount ()
@@ -111,8 +111,9 @@ else
 
     pacargs="--noconfirm -v " #--noprogressbar -v
     pacargs="$pacargs --root=${working_dir}"
-    pacargs="$pacargs --dbpath=${working_dir}/var/lib/pacman"
-    pacargs="$pacargs --cachedir=${working_dir}/var/cache/pacman"
+    # pacman takes these as relative to the given root
+    pacargs="$pacargs --dbpath=/var/lib/pacman"
+    pacargs="$pacargs --cachedir=/var/cache/pacman/pkg"
 
     if [ $# -eq 0 ]; then
         echo "no packages to install"