I’m trying to build the casper theme from its master file (GitHub - TryGhost/Casper: The default theme for Ghost). For test purposes I did’t change anything and sticked to its readme installation advice.
This what i get trying to build with yarn:
yarn dev
yarn run v1.17.3
warning casper@2.10.6: The engine “ghost” appears to be invalid.
warning casper@2.10.6: The engine “ghost-api” appears to be invalid.
$ gulp
[10:10:03] Using gulpfile ~/Documents/Ghost/content/themes/Casper/gulpfile.js
[10:10:03] Starting ‘default’…
[10:10:03] Starting ‘css’…
Replace Autoprefixer browsers option to Browserslist config.
Use browserslist key in package.json or .browserslistrc file.
Using browsers option cause some error. Browserslist config
can be used for Babel, Autoprefixer, postcss-normalize and other tools.
If you really need to use option, rename it to overrideBrowserslist.
Learn more at:
GitHub - browserslist/browserslist: 🦔 Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-preset-env
https://twitter.com/browserslist
[10:10:05] Finished ‘css’ after 1.89 s
[10:10:05] Starting ‘js’…
[10:10:05] Finished ‘js’ after 203 ms
[10:10:05] Starting ‘serve’…
[10:10:05] Finished ‘serve’ after 6.5 ms
[10:10:05] Starting ‘cssWatcher’…
[10:10:05] Starting ‘hbsWatcher’…
After this nothing is happening anymore. I have the suspicion it could be the $PATH. I’m using the latest MacOS.
Happy about everybody who can help 
