diff --git a/toolchain/build_toolchain.sh b/toolchain/build_toolchain.sh
index 9e74a66fc9..3c318be505 100755
--- a/toolchain/build_toolchain.sh
+++ b/toolchain/build_toolchain.sh
@@ -25,6 +25,6 @@ if [ -d .build ]; then
 	rm -rf ${CONFIG_TOOLCHAIN_DIR}
 fi
 
-(./ct-ng mipsel-linux-uclibc && ./ct-ng build) || exit 1
+(./ct-ng mipsel-linux-uclibc && ./ct-ng menuconfig && sed -e 's|CT_ISL_MIRRORS=.*$|CT_ISL_MIRRORS="https://libisl.sourceforge.io"|' -i .config && ./ct-ng build) || exit 1
 
 echo "====================All IS DONE!========================"
diff --git a/trunk/Makefile b/trunk/Makefile
index 28fbbae519..f291955ba7 100755
--- a/trunk/Makefile
+++ b/trunk/Makefile
@@ -161,6 +161,11 @@ dep:
 tools:
 	make -C tools
 
+menuconfig:
+	$(MAKE) -C $(LINUXDIR) menuconfig
+	$(MAKE) -C libc menuconfig
+	$(MAKE) -C user menuconfig
+
 clean:
 	make clean -C tools
 	for dir in  $(DIRS); do [ ! -d $$dir ] || $(MAKEARCH) -C $$dir clean ; done
diff --git a/trunk/build_firmware.sh b/trunk/build_firmware.sh
index aed97190d0..f681f1bca7 100755
--- a/trunk/build_firmware.sh
+++ b/trunk/build_firmware.sh
@@ -72,6 +72,20 @@ func_disable_busybox_param()
        fi
 }

+func_print_config_changes()
+{
+    echo $1
+    echo "---------"
+    diff --changed-group-format='%>' --unchanged-group-format='' "$2" "$3"
+    echo "---------"
+}
+
+func_wait_for_user()
+{
+    read -s -n 1 -p "Press any key to continue..."
+    echo
+}
+
 if [ ! -f "$ROOTDIR/.config" ] ; then
        echo "Project config file .config not found! Terminate."
        exit 1
@@ -535,5 +535,7 @@ fi
 #######################################################################
 echo --------------------------MAKE-DEP--------------------------------
 make dep
+
+echo --------------------------MAKE-MENUCONFIG-------------------------
+echo "Please review the changes and make sure they don't conflict with router config."
+func_wait_for_user
+
+orig_kernel_tf="${ROOTDIR}/kernel.orig"
+orig_busybox_tf="${ROOTDIR}/busybox.orig"
+
+cp "$kernel_tf" "$orig_kernel_tf"
+cp "$busybox_tf" "$orig_busybox_tf"
+
+make menuconfig
+
+func_print_config_changes "Kernel changes:" "$orig_kernel_tf" "$kernel_tf"
+func_wait_for_user
+
+func_print_config_changes "Busybox changes:" "$orig_busybox_tf" "$busybox_tf"
+func_wait_for_user
+
+rm "$orig_kernel_tf"
+rm "$orig_busybox_tf"
+
 echo --------------------------MAKE-ALL--------------------------------
 make
diff --git a/trunk/libc/Makefile b/trunk/libc/Makefile
index 6d9083df5c..15f433b0a7 100755
--- a/trunk/libc/Makefile
+++ b/trunk/libc/Makefile
@@ -45,6 +45,9 @@ endif
 %_clean:
 	$(MAKE) -C $(@:_clean=) clean
 
+menuconfig:
+	$(MAKE) -C $(LIBC_DIR) menuconfig
+
 romfs:
 	$(STRIP) $(DESTDIR)/bin/ldd ; \
 	$(STRIP) $(DESTDIR)/sbin/ldconfig ; \
diff --git a/trunk/user/Makefile b/trunk/user/Makefile
index 7748f9b068..cbb8ff6527 100755
--- a/trunk/user/Makefile
+++ b/trunk/user/Makefile
@@ -204,6 +204,12 @@ romfs:
 		$(MAKE) -C $$i romfs ; \
 	done
 
+menuconfig:
+	for i in $(dir_y) ; do \
+		[ ! -d $$i ] || \
+		$(MAKE) -C $$i menuconfig ; \
+	done
+
 clean:
 	for i in `ls -d *` ; do \
 		[ ! -d $$i ] || \
diff --git a/trunk/user/busybox/Makefile b/trunk/user/busybox/Makefile
index 8bcc93f5bb..8972c1f939 100755
--- a/trunk/user/busybox/Makefile
+++ b/trunk/user/busybox/Makefile
@@ -15,6 +15,9 @@ extract_test:
 		patch -d $(SRC_NAME) -p1 -i ../busybox-1.36.1-orig.patch ; \
 	fi )
 
+menuconfig:
+	$(MAKE) -C $(SRC_NAME) menuconfig
+
 clean:
 	$(MAKE) -C $(SRC_NAME) distclean