Trying to fix snap build.

snapcraft.yaml

@@ -92,8 +92,8 @@ parts:
             chmod +x install_meteor.sh
             sh install_meteor.sh
             rm install_meteor.sh
-            mkdir packages
-            cd packages
+            mkdir -p ~/.meteor/packages
+            cd ~/.meteor/packages
             git clone --depth 1 -b master https://github.com/wekan/flow-router.git kadira-flow-router
             git clone --depth 1 -b master https://github.com/meteor-useraccounts/core.git meteor-useraccounts-core
             sed -i 's/api\.versionsFrom/\/\/api.versionsFrom/' ~/.meteor/packages/meteor-useraccounts-core/package.js