Anaconda Python: How to install missing dependency?

Question

I am trying to install graph-tool from here: http://anaconda.org/vgauthier/graph-tool, using the command mentioned on that page.

I used the given command line:

conda install -c http://conda.anaconda.org/vgauthier graph-tool

and I get the following error:

Error: Could not find some dependencies for graph-tool: pixman

So I tried to install pixman in a similar way: http://anaconda.org/rwest/pixman.

conda install -c http://conda.anaconda.org/rwest pixman

This succeeded.

Yet the "could not find dependency" error is still there when trying to install graph-tool. Why does this happen and how can I fix it? There is no additional error message that I could go on.

Answer 1

Conda needs to be able to find all the dependencies at once. The -c flag only adds that channel for that one command. You would need to run conda install -c vgauthier rwest graph-tool. But an easier way is to add those channels to your configuration

conda config --add channels vgauthier --add channels rwest

Once you do this, you can just run

conda install graph-tool 

and it will grab things from those channels.