Failed to build tag v2.1.8-M1

Hi

I'm trying to build tag v2.1.8-M1 as described in the manual. The npm install works correctly but gulp(or npm run build) throw an exception. The exception can be find below. Can you please suggest what is wrong?

dmirian@dmirian-ubuntu:~/code/swagger-ui$ npm run build

swagger-ui@2.1.8-M1 build /home/dmirian/code/swagger-ui
./node_modules/gulp/bin/gulp.js;

[14:20:32] Using gulpfile ~/code/swagger-ui/gulpfile.js
[14:20:32] Starting 'clean'...
[14:20:32] Finished 'clean' after 50 ms
[14:20:32] Starting 'dist'...
[14:20:32] Starting 'less'...
/home/dmirian/code/swagger-ui/node_modules/gulp-less/index.js:68
}).done(undefined, cb);
^

TypeError: less.render(...).then(...).catch(...).done is not a function
at DestroyableTransform._transform (/home/dmirian/code/swagger-ui/node_modules/gulp-less/index.js:68:8)
at DestroyableTransform.Transform._read (/home/dmirian/code/swagger-ui/node_modules/gulp-less/node_modules/readable-stream/lib/_stream_transform.js:184:10)
at DestroyableTransform.Transform._write (/home/dmirian/code/swagger-ui/node_modules/gulp-less/node_modules/readable-stream/lib/_stream_transform.js:172:12)
at doWrite (/home/dmirian/code/swagger-ui/node_modules/gulp-less/node_modules/readable-stream/lib/_stream_writable.js:237:10)
at writeOrBuffer (/home/dmirian/code/swagger-ui/node_modules/gulp-less/node_modules/readable-stream/lib/_stream_writable.js:227:5)
at DestroyableTransform.Writable.write (/home/dmirian/code/swagger-ui/node_modules/gulp-less/node_modules/readable-stream/lib/_stream_writable.js:194:11)
at write (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:623:24)
at flow (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:632:7)
at DestroyableTransform.pipeOnReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/stream_readable.js:664:5)
at emitNone (events.js:80:13)
at DestroyableTransform.emit (events.js:179:7)
at emitReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:448:10)
at emitReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:444:5)
at readableAddChunk (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:187:9)
at DestroyableTransform.Readable.push (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:149:10)
at DestroyableTransform.Transform.push (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:145:32)
at afterTransform (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:101:12)
at TransformState.afterTransform (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:79:12)
at DestroyableTransform.noop as _transform
at DestroyableTransform.Transform._read (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:184:10)
at DestroyableTransform.Transform._write (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:172:12)
at doWrite (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_writable.js:237:10)
at writeOrBuffer (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_writable.js:227:5)
at DestroyableTransform.Writable.write (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_writable.js:194:11)
at write (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:623:24)
at flow (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:632:7)
at DestroyableTransform.pipeOnReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/stream_readable.js:664:5)
at emitNone (events.js:80:13)
at DestroyableTransform.emit (events.js:179:7)
at emitReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:448:10)
at emitReadable (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:444:5)
at readableAddChunk (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:187:9)
at DestroyableTransform.Readable.push (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:149:10)
at DestroyableTransform.Transform.push (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:145:32)
at afterTransform (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:101:12)
at TransformState.afterTransform (/home/dmirian/code/swagger-ui/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_transform.js:79:12)
at /home/dmirian/code/swagger-ui/node_modules/vinyl-fs/lib/src/getContents/bufferFile.js:12:5
at FSReqWrap.readFileAfterClose as oncomplete

npm ERR! Linux 3.13.0-73-generic
npm ERR! argv "/usr/local/bin/node" "/home/dmirian/.npm-packages/bin/npm" "run" "build"
npm ERR! node v5.10.1
npm ERR! npm v3.8.7
npm ERR! code ELIFECYCLE
npm ERR! swagger-ui@2.1.8-M1 build: ./node_modules/gulp/bin/gulp.js;
npm ERR! Exit status 1

[fehguy]

Please consider using master. The *.M1 / *.M2 builds are extremely old.

Oh... thanks.