Possible Duplicate:
ERROR: While executing gem … (Zlib::GzipFile::Error) not in gzip format
When installing a gem on my system, I get the following error:
gem install blackbook --version ">= 1.0.7" --source http://github.com/tamoyal/blackbook/tree/master ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format Any ideas as to why this is happening? I built the gem so maybe it is something wrong with my gem build?
Thanks
Something isn't set up properly to fetch the gem from GitHub.
try gem fetch -V
steve@macpro:~$ gem fetch blackbook --version ">= 1.0.7" --source http://github.com/tamoyal/blackbook/tree/master -V GET 301 Moved Permanently: http://github.com/tamoyal/blackbook/tree/master/specs.4.8.gz GET 200 OK: http://github.com/tamoyal/blackbook/tree/master/ ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format
You're getting the "not in gzip format" error because gem can't fetch specs.4.8.gz. GitHub returns a 301 redirect back to your project home page, which of course isn't what it wants and isn't gzipped.
Sorry I can't help you further, but I haven't build a gem, much less on GitHub.
You didn't mentioned your system. However it happens on Ubuntu if you do not have zlib library. The solution:
sudo apt-get install libzlib-ruby P.S. I know the question is more than 2 years old. I just hope it might help someone else.
Possibly your gem sources are not set up correctly. http://gems.rubyforge.org/ used to be a correct path to rubygems, but it no longer exists.
run this command:
gem sources If you see http://gems.rubyforge.org/ in your list run:
gem sources -r http://gems.rubyforge.org/ You may also need to add in rubygems.org as a valid source
gem sources -a http://rubygems.org This kind of error was coming to me also. Finally I found that the Proxy settings was not correct. Please check that you can reach the gem server from command line. Just ping it :)