Install of 2.6.2 from conda-forge fails when was previously working

The build output below is for a successful install of `tensorflow-gpu==2.6.2` from 10 days ago.

As of today (2022-02-14), tensorflow-gpu 2.6.2 install now seems not to work despite nothing about the build parameters being changed.

What happened here?

```bash
+ mamba install -y --file requirements.txt
conda-forge/noarch
conda-forge/linux-64
Transaction

Prefix: /opt/conda

Updating specs:

- bokeh==2.3.3
- boto3==1.20.48
- elasticsearch-dsl==7.4.0
- elasticsearch==7.16.3
- matplotlib-base==3.5.1
- nltk==3.6.7
- pandas==1.4.0
- pyod==0.9.7
- pyspark==3.2.1
- scikit-learn==1.0.2
- seaborn==0.11.2
- statsmodels==0.13.1
- tensorflow-gpu==2.6.2
- ca-certificates
- certifi
- openssl

Package Version Build Channel Size
─────────────────────────────────────────────────────────────────────────────────────────────────
Install:
─────────────────────────────────────────────────────────────────────────────────────────────────

+ absl-py 0.15.0 pyhd8ed1ab_0 conda-forge/noarch 98 KB
+ aiohttp 3.8.1 py39h3811e60_0 conda-forge/linux-64 588 KB
+ aiosignal 1.2.0 pyhd8ed1ab_0 conda-forge/noarch 12 KB
+ appdirs 1.4.4 pyh9f0ad1d_0 conda-forge/noarch 13 KB
+ astunparse 1.6.3 pyhd8ed1ab_0 conda-forge/noarch 15 KB
+ async-timeout 4.0.2 pyhd8ed1ab_0 conda-forge/noarch 9 KB
+ aws-c-auth 0.6.7 hfef2836_0 conda-forge/linux-64 94 KB
+ aws-c-compression 0.2.14 h7c7754b_7 conda-forge/linux-64 17 KB
+ aws-c-http 0.6.10 h58a30cf_2 conda-forge/linux-64 173 KB
+ aws-c-mqtt 0.7.9 h042a236_0 conda-forge/linux-64 67 KB
+ aws-c-s3 0.1.27 hae5f17b_11 conda-forge/linux-64 49 KB
+ aws-c-sdkutils 0.1.1 h7c7754b_4 conda-forge/linux-64 23 KB
+ aws-crt-cpp 0.17.8 h82bac0c_1 conda-forge/linux-64 204 KB
+ boto3 1.20.48 pyhd8ed1ab_0 conda-forge/noarch 71 KB
+ botocore 1.23.48 pyhd8ed1ab_0 conda-forge/noarch 5 MB
+ cachetools 4.2.4 pyhd8ed1ab_0 conda-forge/noarch 12 KB
+ cudatoolkit 11.0.3 h15472ef_10 conda-forge/linux-64 953 MB
+ cudnn 8.2.1.32 h86fa8c9_0 conda-forge/linux-64 674 MB
+ elasticsearch 7.16.3 pyhd8ed1ab_0 conda-forge/noarch 139 KB
+ elasticsearch-dsl 7.4.0 py39hf3d152e_1 conda-forge/linux-64 86 KB
+ frozenlist 1.3.0 py39h3811e60_0 conda-forge/linux-64 161 KB
+ gast 0.4.0 pyh9f0ad1d_0 conda-forge/noarch 12 KB
+ google-auth 1.35.0 pyh6c4a22f_0 conda-forge/noarch 81 KB
+ google-auth-oauthlib 0.4.6 pyhd8ed1ab_0 conda-forge/noarch 19 KB
+ google-pasta 0.2.0 pyh8c360ce_0 conda-forge/noarch 42 KB
+ grpcio 1.41.1 py39hff7568b_1 conda-forge/linux-64 2 MB
+ jmespath 0.10.0 pyh9f0ad1d_0 conda-forge/noarch 21 KB
+ keras 2.6.0 pyhd8ed1ab_1 conda-forge/noarch 822 KB
+ keras-preprocessing 1.1.2 pyhd8ed1ab_0 conda-forge/noarch 34 KB
+ markdown 3.3.6 pyhd8ed1ab_0 conda-forge/noarch 67 KB
+ mock 4.0.3 py39hf3d152e_2 conda-forge/linux-64 51 KB
+ multidict 6.0.2 py39h3811e60_0 conda-forge/linux-64 156 KB
+ nccl 2.11.4.1 h17a0586_2 conda-forge/linux-64 151 MB
+ nltk 3.6.7 pyhd8ed1ab_0 conda-forge/noarch 1 MB
+ opt_einsum 3.3.0 pyhd8ed1ab_1 conda-forge/noarch 53 KB
+ py4j 0.10.9.3 pyhd8ed1ab_1 conda-forge/noarch 180 KB
+ pyasn1 0.4.8 py_0 conda-forge/noarch 53 KB
+ pyasn1-modules 0.2.7 py_0 conda-forge/noarch 60 KB
+ pyod 0.9.7 pyhd8ed1ab_0 conda-forge/noarch 81 KB
+ pyspark 3.2.1 pyhd8ed1ab_0 conda-forge/noarch 268 MB
+ python-flatbuffers 1.12 pyhd8ed1ab_1 conda-forge/noarch 19 KB
+ pyu2f 0.1.5 pyhd8ed1ab_0 conda-forge/noarch 31 KB
+ regex 2022.1.18 py39h3811e60_0 conda-forge/linux-64 845 KB
+ requests-oauthlib 1.3.1 pyhd8ed1ab_0 conda-forge/noarch 22 KB
+ rsa 4.8 pyhd8ed1ab_0 conda-forge/noarch 31 KB
+ s3transfer 0.5.1 pyhd8ed1ab_0 conda-forge/noarch 55 KB
+ tensorboard 2.6.0 pyhd8ed1ab_1 conda-forge/noarch 5 MB
+ tensorboard-data-server 0.6.0 py39h95dcef6_1 conda-forge/linux-64 3 MB
+ tensorboard-plugin-wit 1.8.1 pyhd8ed1ab_0 conda-forge/noarch 668 KB
+ tensorflow 2.6.2 cuda110py39h016931e_1 conda-forge/linux-64 29 KB
+ tensorflow-base 2.6.2 cuda110py39h405f49e_1 conda-forge/linux-64 286 MB
+ tensorflow-estimator 2.6.2 cuda110py39h016931e_1 conda-forge/linux-64 653 KB
+ tensorflow-gpu 2.6.2 cuda110py39h5b0ac8e_1 conda-forge/linux-64 29 KB
+ termcolor 1.1.0 py_2 conda-forge/noarch 6 KB
+ typing-extensions 3.7.4.3 0 conda-forge/noarch 8 KB
+ werkzeug 2.0.2 pyhd8ed1ab_0 conda-forge/noarch 221 KB
+ wrapt 1.12.1 py39h3811e60_3 conda-forge/linux-64 47 KB
+ yarl 1.7.2 py39h3811e60_1 conda-forge/linux-64 138 KB

Change:
─────────────────────────────────────────────────────────────────────────────────────────────────

- arrow-cpp 6.0.1 py39h01fd06f_8_cpu installed
+ arrow-cpp 6.0.1 py39h1d68239_0_cpu conda-forge/linux-64 25 MB
- aws-c-event-stream 0.2.7 h3541f99_13 installed
+ aws-c-event-stream 0.2.7 hb80ed28_31 conda-forge/linux-64 47 KB
- pyarrow 6.0.1 py39hff6fa39_8_cpu installed
+ pyarrow 6.0.1 py39hff6fa39_0_cpu conda-forge/linux-64 3 MB

Upgrade:
─────────────────────────────────────────────────────────────────────────────────────────────────

- aws-c-cal 0.5.11 h95a6274_0 installed
+ aws-c-cal 0.5.12 h70efedd_7 conda-forge/linux-64 36 KB
- aws-c-common 0.6.2 h7f98852_0 installed
+ aws-c-common 0.6.17 h7f98852_0 conda-forge/linux-64 179 KB
- aws-c-io 0.10.5 hfb6a706_0 installed
+ aws-c-io 0.10.13 he836878_5 conda-forge/linux-64 137 KB
- aws-checksums 0.1.11 ha31a3da_7 installed
+ aws-checksums 0.1.12 h7c7754b_6 conda-forge/linux-64 50 KB
- aws-sdk-cpp 1.8.186 hb4091e7_3 installed
+ aws-sdk-cpp 1.9.145 hfe59705_2 conda-forge/linux-64 5 MB
- s2n 1.0.10 h9b69904_0 installed
+ s2n 1.3.0 h9b69904_0 conda-forge/linux-64 483 KB

Downgrade:
─────────────────────────────────────────────────────────────────────────────────────────────────

- black 22.1.0 pyhd8ed1ab_0 installed
+ black 21.7b0 pyhd8ed1ab_0 conda-forge/noarch 110 KB
- bokeh 2.4.2 py39hf3d152e_0 installed
+ bokeh 2.3.3 py39hf3d152e_0 conda-forge/linux-64 8 MB
- grpc-cpp 1.42.0 ha1441d3_1 installed
+ grpc-cpp 1.41.1 h75e9d12_2 conda-forge/linux-64 4 MB
- h5py 3.6.0 nompi_py39h7e08c79_100 installed
+ h5py 3.1.0 nompi_py39h25020de_100 conda-forge/linux-64 1 MB
- hdf5 1.12.1 nompi_h2750804_103 installed
+ hdf5 1.10.6 nompi_h6a2412b_1114 conda-forge/linux-64 3 MB
- libprotobuf 3.19.4 h780b84a_0 installed
+ libprotobuf 3.18.1 h780b84a_0 conda-forge/linux-64 3 MB
- numpy 1.21.5 py39haac66dc_0 installed
+ numpy 1.19.5 py39hdbf815f_2 conda-forge/linux-64 5 MB
- orc 1.7.2 h1be678f_0 installed
+ orc 1.7.1 h68e2c4e_0 conda-forge/linux-64 1 MB
- protobuf 3.19.4 py39he80948d_0 installed
+ protobuf 3.18.1 py39he80948d_0 conda-forge/linux-64 347 KB
- pytables 3.7.0 py39h2669a42_0 installed
+ pytables 3.6.1 py39hf6dc253_3 conda-forge/linux-64 2 MB
- six 1.16.0 pyh6c4a22f_0 installed
+ six 1.15.0 pyh9f0ad1d_0 conda-forge/noarch 14 KB
- tomli 2.0.0 pyhd8ed1ab_1 installed
+ tomli 1.2.2 pyhd8ed1ab_0 conda-forge/noarch 15 KB
- typing_extensions 4.0.1 pyha770c72_0 installed
+ typing_extensions 3.7.4.3 py_0 conda-forge/noarch 25 KB

Summary:

Install: 58 packages
Change: 3 packages
Upgrade: 6 packages
Downgrade: 13 packages

Total download: 2 GB

─────────────────────────────────────────────────────────────────────────────────────────────────

Finished s2n (00m:00s) 483 KB 5 MB/s
Finished aws-c-common (00m:00s) 179 KB 1 MB/s
Finished aws-c-compression (00m:00s) 17 KB 104 KB/s
Finished aws-c-cal (00m:00s) 36 KB 189 KB/s
Finished libprotobuf (00m:00s) 3 MB 12 MB/s
Finished hdf5 (00m:00s) 3 MB 13 MB/s
Finished aws-c-http (00m:00s) 173 KB 671 KB/s
Finished aws-c-auth (00m:00s) 94 KB 344 KB/s
Finished tensorboard-data-server (00m:00s) 3 MB 12 MB/s
Finished termcolor (00m:00s) 6 KB 18 KB/s
Finished numpy (00m:00s) 5 MB 16 MB/s
Finished py4j (00m:00s) 180 KB 490 KB/s
Finished python-flatbuffers (00m:00s) 19 KB 53 KB/s
Finished cachetools (00m:00s) 12 KB 31 KB/s
Finished tensorboard-plugin-wit (00m:00s) 668 KB 2 MB/s
Finished aiosignal (00m:00s) 12 KB 29 KB/s
Finished keras-preprocessing (00m:00s) 34 KB 75 KB/s
Finished pyod (00m:00s) 81 KB 163 KB/s
Finished aws-sdk-cpp (00m:00s) 5 MB 9 MB/s
Finished rsa (00m:00s) 31 KB 61 KB/s
Finished boto3 (00m:00s) 71 KB 134 KB/s
Finished protobuf (00m:00s) 347 KB 620 KB/s
Finished google-auth-oauthlib (00m:00s) 19 KB 32 KB/s
Finished pytables (00m:00s) 2 MB 2 MB/s
Finished tensorflow-gpu (00m:00s) 29 KB 44 KB/s
Finished botocore (00m:00s) 5 MB 8 MB/s
Finished grpc-cpp (00m:00s) 4 MB 4 MB/s
Finished aws-checksums (00m:00s) 50 KB 54 KB/s
Finished yarl (00m:00s) 138 KB 143 KB/s
Finished aws-c-mqtt (00m:00s) 67 KB 67 KB/s
Finished six (00m:00s) 14 KB 11 KB/s
Finished keras (00m:00s) 822 KB 626 KB/s
Finished jmespath (00m:00s) 21 KB 15 KB/s
Finished werkzeug (00m:00s) 221 KB 159 KB/s
Finished opt_einsum (00m:00s) 53 KB 38 KB/s
Finished absl-py (00m:00s) 98 KB 68 KB/s
Finished typing-extensions (00m:00s) 8 KB 5 KB/s
Finished pyasn1-modules (00m:00s) 60 KB 39 KB/s
Finished mock (00m:00s) 51 KB 33 KB/s
Finished aiohttp (00m:00s) 588 KB 369 KB/s
Finished tensorflow (00m:00s) 29 KB 16 KB/s
Finished tensorboard (00m:00s) 5 MB 3 MB/s
Finished wrapt (00m:00s) 47 KB 25 KB/s
Finished aws-c-sdkutils (00m:00s) 23 KB 12 KB/s
Finished aws-c-io (00m:00s) 137 KB 71 KB/s
Finished aws-crt-cpp (00m:00s) 204 KB 104 KB/s
Finished tomli (00m:00s) 15 KB 8 KB/s
Finishe
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mamba (0.20.0) supported by @QuantStack

GitHub: https://github.com/mamba-org/mamba
Twitter: https://twitter.com/QuantStack

█████████████████████████████████████████████████████████████

Looking for: ['bokeh==2.3.3', 'boto3==1.20.48', 'elasticsearch-dsl==7.4.0', 'elasticsearch==7.16.3', 'matplotlib-base==3.5.1', 'nltk==3.6.7', 'pandas==1.4.0', 'pyod==0.9.7', 'pyspark==3.2.1', 'scikit-learn==1.0.2', 'seaborn==0.11.2', 'statsmodels==0.13.1', 'tensorflow-gpu==2.6.2']

Pinned packages:
- python 3.9.*
- python 3.9.7

Preparing transaction: ...working... done
Verifying transaction: ...working... done
Executing transaction: ...working... By downloading and using the CUDA Toolkit conda packages, you accept the terms and conditions of the CUDA End User License Agreement (EULA): https://docs.nvidia.com/cuda/eula/index.html

By downloading and using the cuDNN conda packages, you accept the terms and conditions of the NVIDIA cuDNN EULA -
https://docs.nvidia.com/deeplearning/cudnn/sla/index.html

done
d markdown (00m:00s) 67 KB 33 KB/s
Finished astunparse (00m:00s) 15 KB 7 KB/s
Finished nltk (00m:00s) 1 MB 534 KB/s
Finished async-timeout (00m:00s) 9 KB 4 KB/s
Finished elasticsearch-dsl (00m:00s) 86 KB 40 KB/s
Finished frozenlist (00m:00s) 161 KB 73 KB/s
Finished arrow-cpp (00m:01s) 25 MB 12 MB/s
Finished h5py (00m:00s) 1 MB 546 KB/s
Finished aws-c-s3 (00m:00s) 49 KB 21 KB/s
Finished typing_extensions (00m:00s) 25 KB 11 KB/s
Finished pyasn1 (00m:00s) 53 KB 22 KB/s
Finished bokeh (00m:00s) 8 MB 3 MB/s
Finished grpcio (00m:00s) 2 MB 888 KB/s
Finished tensorflow-estimator (00m:00s) 653 KB 246 KB/s
Finished orc (00m:00s) 1 MB 407 KB/s
Finished pyarrow (00m:00s) 3 MB 1 MB/s
Finished requests-oauthlib (00m:00s) 22 KB 7 KB/s
Finished black (00m:00s) 110 KB 38 KB/s
Finished elasticsearch (00m:00s) 139 KB 47 KB/s
Finished appdirs (00m:00s) 13 KB 2 KB/s
Finished s3transfer (00m:00s) 55 KB 7 KB/s
Finished multidict (00m:00s) 156 KB 19 KB/s
Finished pyu2f (00m:00s) 31 KB 4 KB/s
Finished regex (00m:00s) 845 KB 102 KB/s
Finished google-pasta (00m:00s) 42 KB 5 KB/s
Finished gast (00m:00s) 12 KB 1 KB/s
Finished google-auth (00m:00s) 81 KB 10 KB/s
Finished aws-c-event-stream (00m:00s) 47 KB 6 KB/s
Finished nccl (00m:06s) 151 MB 19 MB/s
Finished tensorflow-base (00m:11s) 286 MB 28 MB/s
Finished pyspark (00m:10s) 268 MB 24 MB/s
Finished cudnn (00m:21s) 674 MB 41 MB/s
Finished cudatoolkit (00m:23s) 953 MB 49 MB/s
```

Reproduce the reported `mamba install -y --file requirements.txt` transaction using the pinned packages and the tensorflow-feedstock context shown here. Compare the current resolver output with the earlier successful transaction and trace the package metadata or dependency change responsible; done means the cause is identified and the pinned install works again.

Written by the indexing model from the issue text.