+++ export CONDA_PREFIX=/opt/conda/envs/test-environment
+++ CONDA_PREFIX=/opt/conda/envs/test-environment
+++ export CONDA_SHLVL=1
+++ CONDA_SHLVL=1
+++ export CONDA_DEFAULT_ENV=test-environment
+++ CONDA_DEFAULT_ENV=test-environment
+++ export CONDA_PROMPT_MODIFIER=
+++ CONDA_PROMPT_MODIFIER=
+++ export CONDA_EXE=/opt/conda/bin/conda
+++ CONDA_EXE=/opt/conda/bin/conda
+++ export _CE_M=
+++ _CE_M=
+++ export _CE_CONDA=
+++ _CE_CONDA=
+++ export CONDA_PYTHON_EXE=/opt/conda/bin/python
+++ CONDA_PYTHON_EXE=/opt/conda/bin/python
++ __conda_hashr
++ '[' -n '' ']'
++ '[' -n '' ']'
++ hash -r
+ REQ=ci/requirements-3.9-NIGHTLY
+ conda install -q --file ci/requirements-3.9-NIGHTLY.conda
+ local cmd=install
+ case "$cmd" in
+ __conda_exe install -q --file ci/requirements-3.9-NIGHTLY.conda
+ __add_sys_prefix_to_path
+ '[' -n '' ']'
++ dirname /opt/conda/bin/conda
+ SYSP=/opt/conda/bin
++ dirname /opt/conda/bin
+ SYSP=/opt/conda
+ '[' -n '' ']'
+ PATH=/opt/conda/bin:/opt/conda/envs/test-environment/bin:/opt/conda/condabin:/opt/conda/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ export PATH
+ /opt/conda/bin/conda install -q --file ci/requirements-3.9-NIGHTLY.conda
Collecting package metadata (current_repodata.json): ...working... done
Solving environment: ...working... failed with initial frozen solve. Retrying with flexible solve.
Solving environment: ...working... failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): ...working... done
Solving environment: ...working... /opt/conda/etc/profile.d/conda.sh: line 35:   799 Killed                  "$CONDA_EXE" $_CE_M $_CE_CONDA "$@"
+ return

Exited with code exit status 137
CircleCI received exit code 137