$ sudo apt-get install scap Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: scap : Depends: python-semver but it is not installable E: Unable to correct problems, you have held broken packages. $ sudo apt-cache show python-semver N: Can't select versions from package 'python-semver' as it is purely virtual N: No packages found $ sudo apt-cache show scap Package: scap Version: 3.5.8-1 Architecture: all Maintainer: Wikimedia Foundation Release Engineering <releng@wikimedia.org> Installed-Size: 363 Depends: python, python:any (>= 2.7.5-5~), python:any (<< 2.8), python-jinja2, python-psutil, python-pygments, python-yaml, python-requests, git, bash-completio n, python-semver Suggests: php5-cli, git-fat Priority: optional Section: python Filename: pool/main/s/scap/scap_3.5.8-1_all.deb Size: 79112 SHA256: 6ed54aa925c13e65f7b918f6f39670a0f65dbda5bfd0ef42208a61c57e05406d SHA1: c2d29e6d8ca89006d0a0a45f7124ca2abea502c1 MD5sum: 7fbe1960cfdb49d03150620f1c96b05b Description: Deployment toolchain for Wikimedia projects Scap is a tool that was originally designed to deploy MediaWiki code on Wikimedia Foundation servers. . Functionality has since been added to support just about any git-based project, with additional support for serial deployment groups, templated configuration deployment, rolling or highly concurrent execution, service restart, intermediate checks, and automated rollback. Description-md5: b415d87a48148d14f1746d05500b10f9
At least on scap target host in production (californium) is a trusty host. These errors were seen in the striker labs project where I was trying to setup a new testing server that matches californium.
Probably fixable by backporting the python-semver package from https://packages.ubuntu.com/source/xenial/python-semver