issue_comments

OK. So no point in fixing this. Thanks.

Conda forge recently had a painful process where they rebuilt every package against new compiler versions. It's possible ipykernel may not have been rebuilt yet, which is why conda is trying to install an old rasterio build (which crashes).

OK I think I know what's going on. On a fresh environment it works, but then I installed ipykernel so that I could fiddle around on Jupyter and after that it doesn't work anymore. I don't know if it's of interest to try to fix this or not, I'll let you decide.

Here are the package changes when installing ipykernel

```bash (test_env)$ conda install ipykernel Collecting package metadata: done Solving environment: done

Package Plan

environment location: /Users/yohai/miniconda3/envs/test_env

added / updated specs: - ipykernel

The following NEW packages will be INSTALLED:

ipykernel conda-forge/osx-64::ipykernel-5.1.0-py37h24bf2e0_1002 jupyter_client conda-forge/noarch::jupyter_client-5.2.4-py_1 jupyter_core conda-forge/noarch::jupyter_core-4.4.0-py_0 libsodium conda-forge/osx-64::libsodium-1.0.16-h1de35cc_1001 pyzmq conda-forge/osx-64::pyzmq-17.1.2-py37h111632d_1001 zeromq conda-forge/osx-64::zeromq-4.2.5-h0a44026_1006

The following packages will be UPDATED:

expat conda-forge::expat-2.2.5-h0a44026_1002 --> pkgs/main::expat-2.2.6-h0a44026_0 libpq conda-forge::libpq-10.6-hbe1e24e_1000 --> pkgs/main::libpq-11.1-h051b688_0 openssl 1.0.2p-h1de35cc_1002 --> 1.1.1a-h1de35cc_1000 pcre conda-forge::pcre-8.41-h0a44026_1003 --> pkgs/main::pcre-8.42-h378b8a2_0 postgresql conda-forge::postgresql-10.6-ha1bbaa7~ --> pkgs/main::postgresql-11.1-h051b688_0 python conda-forge::python-3.7.1-h145921a_10~ --> pkgs/main::python-3.7.2-haf84260_0

The following packages will be SUPERSEDED by a higher-priority channel:

cryptography conda-forge::cryptography-2.5-py37hdb~ --> pkgs/main::cryptography-2.4.2-py37ha12b0ac_0 curl conda-forge::curl-7.63.0-heae2a1f_1000 --> pkgs/main::curl-7.63.0-ha441bb4_1000 krb5 conda-forge::krb5-1.16.3-h24a3359_1000 --> pkgs/main::krb5-1.16.1-hddcf347_7 libcurl conda-forge::libcurl-7.63.0-h76de61e_~ --> pkgs/main::libcurl-7.63.0-h051b688_1000 libgdal conda-forge::libgdal-2.4.0-h89caebc_1~ --> pkgs/main::libgdal-2.3.3-h0950a36_0

The following packages will be DOWNGRADED:

libssh2 1.8.0-hf30b1f0_1003 --> 1.8.0-1 rasterio 1.0.13-py37h3683dd5_1 --> 1.0.13-py37h54a03ab_0 ```

Works fine. Thanks. It does suggest there's a problem though, no? Why are there two separate environment specs?

Can you try installing the environment that we use for building the docs: conda env create -n test_env --file doc/environment.yml?