diff --git a/common.d/build_functions.sh b/common.d/build_functions.sh
index dbd910b..3376bd7 100644
--- a/common.d/build_functions.sh
+++ b/common.d/build_functions.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+require "wget"
+
 get_image_path()
 {
     printf "%s" "$(realpath "./raw/${1}.img")"
@@ -34,7 +36,7 @@ create_image()
         rm "$name"
     fi
 
-    truncate --size "$size" "$name" || {
+    truncate -s "$size" "$name" || {
         log "Failed to cretae image [$name]" ierror
         return 1
     }
@@ -119,24 +121,26 @@ prepare_chroot()
     export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:\$PATH
     rootdir="$(realpath "$1")"
 
-    mount --bind /proc "$rootdir/proc" > /dev/null 2>&1
-    mount --bind /sys "$rootdir/sys" > /dev/null 2>&1
-    mount --bind /dev "$rootdir/dev" > /dev/null 2>&1
-    mount --bind /dev/pts "$rootdir/dev/pts" > /dev/null 2>&1
+    mount -t proc proc "$rootdir/proc" > /dev/null 2>&1
+    mount -t sysfs sysfs "$rootdir/sys" > /dev/null 2>&1
+    mount -t devtmpfs devtmpfs "$rootdir/dev" > /dev/null 2>&1
+    mount -t devpts devpts "$rootdir/dev/pts" > /dev/null 2>&1
+    mount -t tmpfs devshm "$rootdir/dev/shm" > /dev/null 2>&1
 
     if uname -m | grep -q aarch64 || [ -f "/proc/sys/fs/binfmt_misc/qemu-aarch64" ]; then
         log "Cancel qemu install for arm64" internal
     else
-        wget -N https://github.com/multiarch/qemu-user-static/releases/download/v7.2.0-1/qemu-aarch64-static -O ./cache/qemu-aarch64-static
+        wget  -q --show-progress -N https://github.com/multiarch/qemu-user-static/releases/download/v7.2.0-1/qemu-aarch64-static -O ./cache/qemu-aarch64-static
         install -m755 ./cache/qemu-aarch64-static "$rootdir/"
 
         # shellcheck disable=SC2028
-        echo ':aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/qemu-aarch64-static:' > /proc/sys/fs/binfmt_misc/register
+        echo ':aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/qemu-aarch64-static:PF' > /proc/sys/fs/binfmt_misc/register 2> /dev/null
     
         # shellcheck disable=SC2028
-        echo ':aarch64ld:M::\x7fELF\x02\x01\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\xb7:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/qemu-aarch64-static:' > /proc/sys/fs/binfmt_misc/register
+        echo ':aarch64ld:M::\x7fELF\x02\x01\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/qemu-aarch64-static:PF' > /proc/sys/fs/binfmt_misc/register 2> /dev/null
     
     fi
+    return 0
 }
 
 detach_chroot()
@@ -148,28 +152,25 @@ detach_chroot()
     }
 
     rootdir=$(realpath "$1")
-    blocking=$(lsof -t "$rootdir")
-    if [ -n "$blocking" ]; then
-        kill -9 "$blocking"
-    fi
-    killall gpg-agent > /dev/null 2>&1
-    umount "$rootdir/proc" > /dev/null 2>&1
-    umount "$rootdir/sys" > /dev/null 2>&1
-    umount "$rootdir/dev/pts" > /dev/null 2>&1
-    umount "$rootdir/dev" > /dev/null 2>&1
+    umount "$rootdir/proc"
+    umount "$rootdir/sys"
+    umount "$rootdir/dev/pts"
+    umount "$rootdir/dev/shm"
+    umount "$rootdir/dev"
 
     if uname -m | grep -q aarch64; then
         log "Cancel qemu uninstall for arm64" internal
     else
         if [ -f "/proc/sys/fs/binfmt_misc/aarch64" ]; then
-            echo -1 > /proc/sys/fs/binfmt_misc/aarch64
+            echo -1 > /proc/sys/fs/binfmt_misc/aarch64 2> /dev/null
         fi
         if [ -f "/proc/sys/fs/binfmt_misc/aarch64ld" ]; then
-            echo -1 > /proc/sys/fs/binfmt_misc/aarch64ld
+            echo -1 > /proc/sys/fs/binfmt_misc/aarch64ld 2> /dev/null
         fi
         if [ -f "$rootdir/qemu-aarch64-static" ]; then
             rm "$rootdir/qemu-aarch64-static"
         fi
     fi
+    return 0
 }