diff --git a/app/build.sh b/app/build.sh
index de092bde16..2e58b687e7 100755
--- a/app/build.sh
+++ b/app/build.sh
@@ -644,11 +644,6 @@ if [ $BUILD_MAC == 1 ]; then
 		cp "$MAC_RUNTIME_PATH/../MacOS/XUL" "$CONTENTSDIR/MacOS/"
 	fi
 
-	# Use our own updater, because Mozilla's requires updates signed by Mozilla
-	cd "$CONTENTSDIR/MacOS"
-	check_lfs_file "$CALLDIR/mac/updater.tar.xz"
-	tar xf "$CALLDIR/mac/updater.tar.xz"
-
 	# Modify Info.plist
 	perl -pi -e "s/\{\{VERSION\}\}/$VERSION/" "$CONTENTSDIR/Info.plist"
 	perl -pi -e "s/\{\{VERSION_NUMERIC\}\}/$VERSION_NUMERIC/" "$CONTENTSDIR/Info.plist"
@@ -1027,11 +1022,6 @@ if [ $BUILD_LINUX == 1 ]; then
 		# Copy Ubuntu launcher files
 		cp "$CALLDIR/linux/zotero.desktop" "$APPDIR"
 		cp "$CALLDIR/linux/set_launcher_icon" "$APPDIR"
-		
-		# Use our own updater, because Mozilla's requires updates signed by Mozilla
-		check_lfs_file "$CALLDIR/linux/updater.tar.xz"
-		tar xf "$CALLDIR/linux/updater.tar.xz" --to-stdout updater-$arch > "$APPDIR/updater"
-		chmod 755 "$APPDIR/updater"
 
 		# Copy app files
 		rsync -a "$base_dir/" "$APPDIR/"
@@ -1041,6 +1031,7 @@ if [ $BUILD_LINUX == 1 ]; then
 		cp -RH "$CALLDIR/modules/zotero-libreoffice-integration/install" "$APPDIR/integration/libreoffice"
 		
 		# Copy icons
+		mkdir -p "$APPDIR/icons/"
 		cp "$CALLDIR/linux/icons/icon32.png" "$APPDIR/icons/"
 		cp "$CALLDIR/linux/icons/icon64.png" "$APPDIR/icons/"
 		cp "$CALLDIR/linux/icons/icon128.png" "$APPDIR/icons/"