With -X you can add some libraries only on the alpine edge branch. Here is and example for zbar or libzbar
apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing zbar
With -X you can add some libraries only on the alpine edge branch. Here is and example for zbar or libzbar
apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing zbar