diff --git a/build.sh b/build.sh
index 8721472..f527738 100755
--- a/build.sh
+++ b/build.sh
@@ -109,6 +109,25 @@ change_owner() {
 	sudo chown -R root:root "$SYSROOT"/{etc,cross,usr,dev,proc,sys,run,var}
 }
 
+do_mount() {
+	if ! mountpoint -q "$SYSROOT/dev"; then
+		sudo mount --bind /dev "$SYSROOT"/dev
+		sudo mount -t devpts devpts -o gid=5,mode=0620 "$SYSROOT"/dev/pts
+		sudo mount -t proc proc "$SYSROOT"/proc
+		sudo mount -t sysfs sysfs "$SYSROOT"/sys
+		sudo mount -t tmpfs tmpfs "$SYSROOT"/run
+		if [ -h "$SYSROOT"/dev/shm ]; then
+			sudo install -d -m 1777 "$SYSROOT"$(realpath /dev/shm)
+		else
+			sudo mount -t tmpfs -o nosuid,nodev tmpfs "$SYSROOT"/dev/shm
+		fi
+	fi
+}
+
+do_unmount() {
+	sudo umount -R "$SYSROOT/"
+}
+
 fetch() {
     wget -N -c --show-progress -q -P "$SOURCES" $1
 }
@@ -614,4 +633,5 @@ toolchain_gcc() {
 #toolchain_xz
 #toolchain_binutils
 #toolchain_gcc
-change_owner
\ No newline at end of file
+#change_owner
+do_mount
\ No newline at end of file