Cask basictex: Cask reports different checksums

[AtteBox]

Output of brew config

HOMEBREW_VERSION: 5.1.0
ORIGIN: https://github.com/Homebrew/brew
HEAD: 4135badeddc3899aa2e89d3ea1caee320c55d299
Last commit: 11 days ago
Branch: stable
Core tap JSON: 22 Mar 14:06 UTC
Core cask tap JSON: 22 Mar 14:06 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_DOWNLOAD_CONCURRENCY: 16
HOMEBREW_FORBID_PACKAGES_FROM_PATHS: set
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 4.0.1 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/4.0.1/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
Clang: 17.0.0 build 1700
Git: 2.53.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 26.3-arm64
CLT: 26.3.0.0.1.1771626560
Xcode: 26.3
Metal Toolchain: N/A
Rosetta 2: false

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  python@3.8

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  icu4c@75
  python@3.8

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected header files:
  /usr/local/include/node/*

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  dotnet
  powershell

Warning: Broken symlinks were found. Remove them with `brew cleanup`:
  /opt/homebrew/opt/python@3

Description of issue

When executing "brew upgrade" I got the following output:

...
✘ Cask basictex (2026.0301)                                        Verifying     2.4KB/327.0 B
Error: Cask reports different checksum:     19164fbfef08c30fd433f59203c8804abbbd685d3a344ef7f0ba8c1fd4157cb3n@3.13 (3.13.12_1)      ##############               Downloading   9.2MB/ 18.4MB
       SHA-256 checksum of downloaded file: 9646f2028d44b3ac6b87847842922f3cf7102579c0e4f989b5b579d98d9dbba6xl (0.11.2)             #################            Downloading   8.3MB/ 13.8MB
✔︎ Bottle gnupg (2.5.18)                                            Downloaded    5.6MB/  5.6MB
...

Somehow the package anyway proceeeded to be installed:

...
==> Upgrading basictex
==> Caveats
You must restart your terminal window for the installation of MacTeX CLI
tools to take effect.

Alternatively, Bash and Zsh users can run the command:

  eval "$(/usr/libexec/path_helper)"

==> Uninstalling packages with `sudo` (which may request your password)...
org.tug.mactex.basictex2025
Password:
==> Removing files:
/etc/manpaths.d/TeX
/etc/paths.d/TeX
/Library/TeX
/usr/local/texlive/2025basic
==> Running installer for basictex with `sudo` (which may request your password)...
installer: Package name is 
installer: Installing at base path /
installer: The install was successful.
==> Purging files for version 2025.0308 of Cask basictex
🍺  basictex was successfully upgraded!
...

Basictext was again mentioned in the end of the output:

...
==> basictex
You must restart your terminal window for the installation of MacTeX CLI
tools to take effect.

Alternatively, Bash and Zsh users can run the command:

  eval "$(/usr/libexec/path_helper)"

Do I need to worry about what got installed in this case?

Relevant casks

basictex

[botantony]

https://docs.brew.sh/Common-Issues#cask---checksum-does-not-match

[daeho-ro]

Can you check what mirror is used to download the package?

curl -I HEAD -v https://mirror.ctan.org/systems/mac/mactex/mactex-basictex-20260301.pkg

< HTTP/1.1 307 Temporary Redirect
HTTP/1.1 307 Temporary Redirect
< Date: Wed, 25 Mar 2026 05:52:40 GMT
Date: Wed, 25 Mar 2026 05:52:40 GMT
< Server: Apache
Server: Apache
< Location: https://mirror.kakao.com/CTAN/systems/mac/mactex/mactex-basictex-20260301.pkg
Location: https://mirror.kakao.com/CTAN/systems/mac/mactex/mactex-basictex-20260301.pkg
< Content-Type: text/html; charset=iso-8859-1
Content-Type: text/html; charset=iso-8859-1
< 

* Connection #1 to host mirror.ctan.org left intact

For me, it is fine but there might be some bad mirror.

curl -sL https://mirror.kakao.com/CTAN/systems/mac/mactex/mactex-basictex-20260301.pkg | shasum --algorithm 256

19164fbfef08c30fd433f59203c8804abbbd685d3a344ef7f0ba8c1fd4157cb3

[AtteBox]

Was fine for me like that too.