Unable to "composer install"

[linuxd3v]

Loading composer repositories with package information Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1

• Installation request for zf-commons/zfc-base dev-master -> satisfiable by zf-commons/zfc-base[dev-master].
• zf-commons/zfc-user dev-master requires zf-commons/zfc-base 0.* -> satisfiable by zf-commons/zfc-base[0.0.1, 0.1.0, 0.1.1, v0.1.2].
• Can only install one of: zf-commons/zfc-base[dev-master, 0.0.1].
• Can only install one of: zf-commons/zfc-base[dev-master, 0.1.0].
• Can only install one of: zf-commons/zfc-base[dev-master, 0.1.1].
• Can only install one of: zf-commons/zfc-base[v0.1.2, dev-master].
• Installation request for zf-commons/zfc-user dev-master -> satisfiable by zf-commons/zfc-user[dev-master].