Fresh install of documentjs failes

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Brand new DoneJS install using DoneJS 1.1
npm 5.6
node 8.9.3

donejs add app doccss
cd doccss
npm install --save-dev documentjs

created a document.json:

{
"sites": {
  "docs": {
      "dest": "docs",
      "glob": {
        "pattern": "src/**/*.{js,md}"
      }
    },
    "styles": {
     "parent": "styles",
      "glob": "{styles,src}/**/*.{md,css,less}",
      "dest": "styleguide"
    }
  }
 }

created a styles dir with a styles.md file
./node_modules/.bin/documentjs
produces this error:
Error: ENOENT: no such file or directory, open '/home/pault/doccss/node_modules/documentjs/site/templates/99914b932bd37a50b983c5e7c90ae93b/layout.mustache'

That dir does exist, but it's empty.

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running --force-build fixes this. I have to run it every time though.