Gulp errors with fresh install

Hello,

I'm setting up a new project with a fresh Spark install, and I get this error when I try to use Gulp:

[14:22:31] Using gulpfile ~/Projects/***/gulpfile.js
[14:22:31] Starting 'all'...
[14:22:31] Starting 'less'...
[14:22:31] 'less' errored after 11 ms
[14:22:31] Error: Cannot find module './src/init'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/Users/Charles/Projects/***/node_modules/gulp-sourcemaps/index.js:4:9)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
[14:22:31] 'all' errored after 14 ms
[14:22:31] Error in plugin 'run-sequence(less)'
Message:
    Cannot find module './src/init'
Details:
    code: MODULE_NOT_FOUND
Stack:
Error: Cannot find module './src/init'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/Users/Charles/Projects/***/node_modules/gulp-sourcemaps/index.js:4:9)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)

I've done this…

rm -rf node_modules
npm install

…but it didn't fix anything.

npm list shows that init is installed:

├─┬ [email protected]
│ └── [email protected]

I'm not sure what to do next. Any thoughts appreciated!

— Charles