Installation Error with referencing

[ysBach]

Describe the bug

context I fresh-downloaded mambaforge OS X, arm64 (Apple Silicon) (Mambaforge-MacOSX-arm64)

I am using MBP 14" [2021, macOS 13.1, M1Pro(6P+2E/G16c/N16c/32G)] with python 3.10.12 mamba 1.4.9 conda 23.7.2

bug

> mamba install -c conda-forge jupyter-book --yes

Looking for: ['jupyter-book']

conda-forge/osx-arm64                                       Using cache
conda-forge/noarch                                          Using cache
pkgs/main/osx-arm64                                           No change
pkgs/r/osx-arm64                                              No change
pkgs/main/noarch                                              No change
pkgs/r/noarch                                                 No change

Pinned packages:
  - python 3.10.*

Could not solve for environment specs
The following packages are incompatible
├─ jupyter-book is installable with the potential options
│  ├─ jupyter-book [0.10.1|0.10.2|0.8.2] would require
│  │  ├─ jupytext >=1.8.0,<1.11 , which requires
│  │  │  └─ markdown-it-py [>=0.5.2,<0.6 |>=0.6,<0.7 ], which requires
│  │  │     └─ attrs >=19.3,<21 , which can be installed;
│  │  └─ myst-nb >=0.10.1,<0.11 , which requires
│  │     └─ myst-parser >=0.12.9,<0.13 , which requires
│  │        └─ markdown-it-py ~=0.5.4 , which can be installed (as previously explained);
│  ├─ jupyter-book [0.11.1|0.11.2|0.11.3] would require
│  │  └─ sphinx-external-toc [~=0.2.0 |~=0.2.1 ] with the potential options
│  │     ├─ sphinx-external-toc 0.2.0 would require
│  │     │  └─ attrs >=19.2,<21 , which can be installed;
│  │     ├─ sphinx-external-toc [0.2.1|0.2.2] would require
│  │     │  └─ attrs >=19.2,<22 , which can be installed;
│  │     └─ sphinx-external-toc [0.2.3|0.2.4|0.3.1] would require
│  │        └─ attrs >=20.3,<22 , which can be installed;
│  └─ jupyter-book [0.12.0|0.12.1|...|0.15.1] would require
│     └─ sphinx-external-toc [>=0.2.3,<0.3 |>=0.2.3,<0.3.0 |>=0.3.1,<0.4.0 ], which can be installed (as previously explained);
└─ referencing is not installable because it requires
   └─ attrs >=22.2.0 , which conflicts with any installable versions previously reported.

problem I restarted, retried multiple times but keep failing.

Reproduce the bug

mamba install -c conda-forge jupyter-book --yes

List your environment

❯ jupyter-book --version
zsh: command not found: jupyter-book

[afeld]

I also got

Could not solve for environment specs
The following packages are incompatible

In my case, it was because I didn't include the conda-forge channel. I know that's not your issue, but sharing in case anyone else stumbles upon this.