diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
old mode 100644
new mode 100755
diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
diff --git a/.gitmodules b/.gitmodules
old mode 100644
new mode 100755
diff --git a/CONFIG.md b/CONFIG.md
old mode 100644
new mode 100755
diff --git a/LICENSE b/LICENSE
old mode 100644
new mode 100755
diff --git a/README.md b/README.md
old mode 100644
new mode 100755
diff --git a/build.sh b/build.sh
index 51e69c2..2ba8a87 100755
--- a/build.sh
+++ b/build.sh
@@ -43,7 +43,11 @@ for table_name in $(toml_get_table_names); do
 	app_args[allow_alpha_version]=$(toml_get "$t" allow-alpha-version) || app_args[allow_alpha_version]=false
 	app_args[build_mode]=$(toml_get "$t" build-mode) || app_args[build_mode]=apk
 	app_args[microg_patch]=$(toml_get "$t" microg-patch) || app_args[microg_patch]=""
-	app_args[uptodown_dlurl]=$(toml_get "$t" uptodown-dlurl) && app_args[uptodown_dlurl]=${app_args[uptodown_dlurl]%/} || app_args[uptodown_dlurl]=""
+	app_args[uptodown_dlurl]=$(toml_get "$t" uptodown-dlurl) && {
+		app_args[uptodown_dlurl]=${app_args[uptodown_dlurl]%/}
+		app_args[uptodown_dlurl]=${app_args[uptodown_dlurl]%download}
+		app_args[uptodown_dlurl]=${app_args[uptodown_dlurl]%/}
+	} || app_args[uptodown_dlurl]=""
 	app_args[apkmirror_dlurl]=$(toml_get "$t" apkmirror-dlurl) && app_args[apkmirror_dlurl]=${app_args[apkmirror_dlurl]%/} || app_args[apkmirror_dlurl]=""
 
 	app_args[arch]=$(toml_get "$t" arch) || app_args[arch]="all"
@@ -58,7 +62,13 @@ for table_name in $(toml_get_table_names); do
 	elif [ "${app_args[arch]}" = "arm-v7a" ]; then
 		app_args[apkmirror_regex]='armeabi-v7a</div>[^@]*@\([^"]*\)'
 	fi
-	if [ "${app_args[apkmirror_dlurl]:-}" ] && [ "${app_args[apkmirror_regex]:-}" ]; then app_args[dl_from]=apkmirror; else app_args[dl_from]=uptodown; fi
+	if [ "${app_args[apkmirror_dlurl]:-}" ]; then
+		app_args[dl_from]=apkmirror
+	elif [ "${app_args[uptodown_dlurl]:-}" ]; then
+		app_args[dl_from]=uptodown
+	else
+		abort "ERROR: both 'apkmirror_dlurl' and 'uptodown_dlurl' were not set."
+	fi
 
 	app_args[patcher_args]="$(join_args "${excluded_patches}" -e) $(join_args "${included_patches}" -i)"
 	[ "$merge_integrations" = true ] && app_args[patcher_args]="${app_args[patcher_args]} -m ${RV_INTEGRATIONS_APK}"
diff --git a/config.toml b/config.toml
old mode 100644
new mode 100755
diff --git a/ks.keystore b/ks.keystore
old mode 100644
new mode 100755
diff --git a/scripts/customize.sh b/scripts/customize.sh
index a81d32b..fcc73f8 100755
--- a/scripts/customize.sh
+++ b/scripts/customize.sh
@@ -12,11 +12,6 @@ else
 fi
 set_perm_recursive $MODPATH/bin 0 0 0755 0777
 
-basepath() {
-	basepath=$(pm path __PKGNAME | grep base)
-	echo ${basepath#*:}
-}
-
 grep __PKGNAME /proc/self/mountinfo | while read -r line; do
 	ui_print "- Un-mount"
 	mountpoint=$(echo "$line" | cut -d' ' -f5)
@@ -24,17 +19,19 @@ grep __PKGNAME /proc/self/mountinfo | while read -r line; do
 done
 am force-stop __PKGNAME
 
-BASEPATH=$(basepath)
+BASEPATH=$(pm path __PKGNAME | grep base)
+BASEPATH=${BASEPATH#*:}
 if [ -n "$BASEPATH" ] && cmpr $BASEPATH $MODPATH/__PKGNAME.apk; then
 	ui_print "- __PKGNAME is up-to-date"
 else
 	ui_print "- Updating __PKGNAME (v__PKGVER)"
 	set_perm $MODPATH/__PKGNAME.apk 1000 1000 644 u:object_r:apk_data_file:s0
-	if ! op=$(cmd package install --user 0 -i com.android.vending -r -d $MODPATH/__PKGNAME.apk 2>&1); then
+	if ! op=$(pm install --user 0 -i com.android.vending -r -d $MODPATH/__PKGNAME.apk 2>&1); then
 		ui_print "ERROR: APK installation failed!"
 		abort "$op"
 	fi
-	BASEPATH=$(basepath)
+	BASEPATH=$(pm path __PKGNAME | grep base)
+	BASEPATH=${BASEPATH#*:}
 	if [ -z "$BASEPATH" ]; then
 		abort "ERROR: install __PKGNAME manually and reflash the module"
 	fi
@@ -55,9 +52,10 @@ ui_print "- Mounting __PKGNAME"
 RVPATH=/data/adb/__PKGNAME_rv.apk
 ln -f $MODPATH/base.apk $RVPATH
 
-if ! op=$(mount -o bind $RVPATH $BASEPATH 2>&1); then
+if ! op=$(su -Mc mount -o bind $RVPATH $BASEPATH 2>&1); then
 	ui_print "ERROR: Mount failed!"
-	abort "$op"
+	ui_print "$op"
+	abort "Flash the module in official Magisk Manager app"
 fi
 am force-stop __PKGNAME
 ui_print "- Optimizing __PKGNAME"
diff --git a/scripts/service.sh b/scripts/service.sh
old mode 100644
new mode 100755
index 52ffd71..28164fe
--- a/scripts/service.sh
+++ b/scripts/service.sh
@@ -17,7 +17,7 @@ if [ $BASEPATH ] && [ -d ${BASEPATH%base.apk}lib ]; then
 		        umount -l "${mountpoint%%\\*}"
 		done
 		chcon u:object_r:apk_data_file:s0 $RVPATH
-		mount -o bind $RVPATH $BASEPATH
+		su -Mc mount -o bind $RVPATH $BASEPATH
 		am force-stop __PKGNAME
 	fi
 fi
diff --git a/scripts/uninstall.sh b/scripts/uninstall.sh
old mode 100644
new mode 100755
diff --git a/utils.sh b/utils.sh
index 4e1d862..c05b60d 100755
--- a/utils.sh
+++ b/utils.sh
@@ -71,7 +71,7 @@ get_cmpr() {
 	dl_if_dne "${MODULE_TEMPLATE_DIR}/bin/arm/cmpr" "https://github.com/j-hc/cmpr/releases/latest/download/cmpr-armeabi-v7a"
 }
 
-abort() { echo "abort: $1" && exit 1; }
+abort() { echo >&2 "abort: $1" && exit 1; }
 
 set_prebuilts() {
 	[ -d "$TEMP_DIR" ] || abort "${TEMP_DIR} directory could not be found"