gulp if issue

gulpfile.coffee

  src("coffee")
    # For source maps we also need to move the coffee files into build
    .pipe(gulpif(isDev, dest("build.coffee")))
    .pipe(plumber())
    .pipe(print())
    .pipe(logErrors(coffee(sourceMap: isDev)))
    .pipe(dest("build.coffee"))

# When isDev is true, only .coffee files ends up in build dir, no .js or .map files.  
# print() prints out no files, its as if the pipeline chain halts

# If I remove the gulpif, I get all 3 file types as desired.  
# But I'd like to use gulpif to not get .map and .coffee files when I'm not in dev

  src("coffee")
    # For source maps we also need to move the coffee files into build
    .pipe(dest("build.coffee"))
    .pipe(plumber())
    .pipe(print())
    .pipe(logErrors(coffee(sourceMap: isDev)))
    .pipe(dest("build.coffee"))

.pipe(dest("build.coffee"))