~$ conda config --add channels conda-forge
~$ conda create -n h-to-v python=2.7 obspy=1.1.0 pyqt=4 mtspec git
Fetching package metadata .............
Solving package specifications: .

Package plan for installation in environment /home/megies/anaconda/envs/h-to-v:

The following NEW packages will be INSTALLED:

    asn1crypto:         0.22.0-py27_0      conda-forge
    backports_abc:      0.5-py27_0         conda-forge
    [...]
    numpy:              1.13.1-py27_0
    obspy:              1.1.0-py27_1       conda-forge
    [...]
    wheel:              0.30.0-py_1        conda-forge
    xz:                 5.2.3-0            conda-forge
    zlib:               1.2.11-0           conda-forge

Proceed ([y]/n)?

mtspec-0.3.2-p 100% |##################################################################################| Time: 0:00:01 906.60 kB/s
#
# To activate this environment, use:
# > source activate h-to-v
#
# To deactivate an active environment, use:
# > source deactivate
#

~$ source activate h-to-v
(h-to-v) ~$ git clone https://github.com/krischer/htov-toolbox
Cloning into 'htov-toolbox'...
remote: Counting objects: 48, done.
remote: Total 48 (delta 0), reused 0 (delta 0), pack-reused 48
Receiving objects: 100% (48/48), 716.65 KiB | 673.00 KiB/s, done.
Resolving deltas: 100% (20/20), done.
(h-to-v) ~$ cd htov-toolbox
(h-to-v) ~/htov-toolbox$ python htov_toolbox.py  # run the GUI