getting readthedocs working...

.readthedocs.yml

+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Build documentation with MkDocs
+#mkdocs:
+#  configuration: mkdocs.yml
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats: html
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.7
+  install:
+    - requirements: docs/requirements.txt
+
+conda:
+  environment: environment.yml

docs/requirements.txt

-h5py
-scipy
-numpy
-tqdm
-pocl
-pyopencl

environment.yml

+name: test3
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - pyqt
+  - pyqtgraph
+  - h5py
+  - scipy
+  - numpy
+  - tqdm
+  - pocl
+  - pyopencl
+  - pip