No package 'rubygem(sass-rails)' available.

[voxik]

These are my dependencies:

  dependencies:
  - rpm:
    - rubygem(rails)
    - rubygem(sqlite3)
    - rubygem(jquery-rails)
    - rubygem(coffee-rails)
    - rubygem(sass-rails)

Unfortunately, the sass-rails cannot be installed for some non-obvious reasons:

INFO - Checking for presence of rubygem(coffee-rails)...
INFO - Found rubygem-coffee-rails-3.2.2-1.fc18.noarch
INFO - Checking for presence of rubygem(sass-rails)...
INFO - Not found
INFO - Installing: rubygem(sass-rails)
Loaded plugins: langpacks, presto, refresh-packagekit, security
No package 'rubygem(sass-rails)' available.
Error: Nothing to do
ERROR - Failed to install: rubygem(sass-rails)

While it can be installed from command line just fine:

# yum install 'rubygem(sass-rails)'
Loaded plugins: langpacks, presto, refresh-packagekit, security
Resolving Dependencies
--> Running transaction check
---> Package rubygem-sass-rails.noarch 0:3.2.5-1.fc18 will be installed
--> Processing Dependency: rubygem(sass) >= 3.1.10 for package: rubygem-sass-rails-3.2.5-1.fc18.noarch

[voxik]

Please note that changing the dependency to rubygem-sass-rails works, but anyway, there is no reason why virtual provide should not work (especially if they work in other cases).

[bkabrda]

Good catch. After some investigation, it turns out to be an issue in plumbum, the library used for executing commandline commands. I reported the problem [1] and we'll see what the upstream has to say about that. Working around on devassistant side would also be possible, but let's wait for the plumbum upstream first...

[1] tomerfiliba/plumbum#61