Breakpoint does not output anything - breakpoint-sass

Question

Having a very weird breakpoint problem.
Screen.scss contains the most basic breakpoint example:
#import "breakpoint";
$high-tide: 500px;
.johnny-utah {
color: blue;
#include breakpoint($high-tide) {
content: 'Whoa.';
}
}
This gets compiled to:
.johnny-utah {
color: blue;
}
Seems like breakpoint is not returning anything. It used to work before.
Compass 1.0.1, Breakpoint 2.5.0 and SASS 3.4.3 running on OS X.10.
My config.rb is nothing special:
# Require any additional compass plugins here.
require 'breakpoint'
# Set this to the root of your project when deployed:
http_path = "/"
css_dir = "stylesheets"
sass_dir = "sass"
images_dir = "images"
javascripts_dir = "javascripts"
fonts_dir = "fonts"
output_style = :nested
# To enable relative paths to assets via compass helper functions. Uncomment:
# relative_assets = true
# To disable debugging comments that display the original location of your selectors. Uncomment:
# line_comments = false
color_output = true
# If you prefer the indented syntax, you might want to regenerate this
# project again passing --syntax sass, or you can uncomment this:
# preferred_syntax = :sass
# and then run:
# sass-convert -R --from scss --to sass sass scss && rm -rf sass && mv scss sass
preferred_syntax = :scss

Answer 1

Never mind, this was my most stupid error ever!
This was an old project and I thought I was using Breakpoint back then, but no ... I used my own mixin called _breakpoint.scss which looked like this:
#mixin breakpoint($breakpoint) {
#if $breakpoint == tablet {
#media only screen and (min-width: 768px) { #content; }
}
#if $breakpoint == desktop {
#media only screen and (min-width: 1024px) { #content; }
}
#else if $breakpoint == big_desktop {
#media only screen and (min-width: 1280px) { #content; }
}
}
That's why nothing was outputted ..