Bottle missing for macOS 26/x86

[ocmstone]

brew gist-logs <formula> link OR brew config AND brew doctor output

$ brew gist-logs dotnet@8
Error: No logs.

Verification

• My brew doctor output says Your system is ready to brew. and am still able to reproduce my issue.
• I ran brew update and am still able to reproduce my issue.
• I have resolved all warnings from brew doctor and that did not fix my problem.
• I searched for recent similar issues at https://github.com/Homebrew/homebrew-core/issues?q=is%3Aissue and found no duplicates.
• My issue is not about a failure to build a formula from source.

What were you trying to do (and why)?

brew upgrade dotnet@8

According to homebrew documentation, Tahoe running on x86 is currently tier1, and will remain tier1 until at least September of 2026. However, attempting to brew upgrade dotnet@8, says "This is a Tier 3 Configuration", and there is no bottle.

What happened (include all command output)?

Pretty straightforward - the bottle seems to be missing, and the message about Tier 3 is wrong...

$ brew upgrade
==> Upgrading 1 outdated package:
dotnet@8 8.0.15 -> 8.0.121
==> Fetching downloads for: dotnet@8
Error: dotnet@8: no bottle available!
If you're feeling brave, you can try to install from source with:
  brew install --build-from-source dotnet@8

This is a Tier 3 configuration:
  https://docs.brew.sh/Support-Tiers#tier-3

What did you expect to happen?

I expected my formula to be upgraded to 8.0.121 via existing bottle for my Tier 1 configuration

Step-by-step reproduction instructions (by running brew commands)

$ uname -a
Darwin {redacted} 25.0.0 Darwin Kernel Version 25.0.0: Wed Sep 17 21:39:53 PDT 2025; root:xnu-12377.1.9~141/RELEASE_X86_64 x86_64


$ sw_vers
ProductName:		macOS
ProductVersion:		26.0.1
BuildVersion:		25A362


$ brew upgrade
==> Upgrading 1 outdated package:
dotnet@8 8.0.15 -> 8.0.121
==> Fetching downloads for: dotnet@8
Error: dotnet@8: no bottle available!
If you're feeling brave, you can try to install from source with:
  brew install --build-from-source dotnet@8

This is a Tier 3 configuration:
  https://docs.brew.sh/Support-Tiers#tier-3

[SMillerDev]

What do brew config and brew doctor say?

[ocmstone]

This is not related to a local build issue and I just successfully completed the upgrade of 69 other packages - oddly enough that included upgrading powershell to 7.5.4.

The dotnet@8 is the only one out of 70 total that failed, and continues to fail.

Ruby 3.3.0 was installed using rvm because I needed an older version and had to try several to find the right one.

I do not see anything relevant here:

$ 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 casks are deprecated or disabled.
You should find replacements for the following casks:
  powershell

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-pyparsing

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  icu4c@76
  openssl@1.1

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/ruby-3.3.0/*

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

Unexpected '.pc' files:
  /usr/local/lib/pkgconfig/ruby-3.3.pc

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

Unexpected static libraries:
  /usr/local/lib/libruby.3.3-static.a

Warning: Homebrew's "sbin" was not found in your PATH but you have installed
formulae that put executables in /usr/local/sbin.
Consider setting your PATH for example like so:
  echo 'export PATH="/usr/local/sbin:$PATH"' >> /Users/mstone/.bash_profile

$ brew config
HOMEBREW_VERSION: 4.6.18
ORIGIN: https://github.com/Homebrew/brew
HEAD: 00001bedf8eac442bdabd327148be0b97998b27b
Last commit: 2 days ago
Branch: stable
Core tap JSON: 21 Oct 15:29 UTC
Core cask tap JSON: 21 Oct 15:29 UTC
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.VhD4EIaFPm/org.xquartz:0
HOMEBREW_FORBID_PACKAGES_FROM_PATHS: set
HOMEBREW_MAKE_JOBS: 12
Homebrew Ruby: 3.4.5 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/3.4.5/bin/ruby
CPU: dodeca-core 64-bit kabylake
Clang: 17.0.0 build 1700
Git: 2.51.1 => /usr/local/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 26.0.1-x86_64
CLT: 26.0.0.0.1.1757719676
Xcode: 26.0.1

[SMillerDev]

https://formulae.brew.sh/formula/dotnet@8#default suggests that there are indeed no x86 bottles for macOS. In fact, looking at the history it only ever managed to build on macOS Ventura-x86

[ZhongRuoyu]

This uncovered a tricky situation -- now for most formulae we only build Intel bottles for the oldest macOS version with tier-1 support, which is currently Sonoma. We also have a logic in brew test-bot that ignores failures if the formula is not already bottled for the current platform.

Now, before #249583, we only offered bottles for Ventura on Intel. The fact that it wasn't already bottled for Intel Sonoma caused CI to silently fail on that platform: https://github.com/Homebrew/homebrew-core/actions/runs/18508609774/job/52744141485.

[github-actions]

❌ @ZhongRuoyu bottle request for dotnet@8 failed.

[p-linnane]

Considering we have not been able to get it to build on anything newer than Ventura, it's unlikely that there will be another bottle for it on Intel macOS.

[ocmstone]

Considering we have not been able to get it to build on anything newer than Ventura, it's unlikely that there will be another bottle for it on Intel macOS.

The error output looks like a pipeline or build image problem - not necessarily a problem with the formula. I am attempting to build it on Intel Macs running both Tahoe and Sequoia. Although it is taking a ridiculous amount of time, it seems to be progressing on both. If successful can I upload bottles for y'all?

Microsoft is still publishing .pkg files, could we convert them to bottles?

[p-linnane]

If successful can I upload bottles for y'all?

No, but you can contribute any fixes to the formula which we will then build on our own CI.

Microsoft is still publishing .pkg files, could we convert them to bottles?

Everything in Homebrew/core must be built from source on our own CI.

[ocmstone]

Everything in Homebrew/core must be built from source on our own CI.

Then I repsectfully suggest we fix the CI. Even if only 15% of macs out there are still Intel, that's over 15 million devices.

No, but you can contribute any fixes to the formula which we will then build on our own CI.

If it needs fixed and I am able to do so, I'll be happy to contribute!

[ocmstone]

This is Tahoe 26.0.1 on a macBook Pro w/12 processors and 32GB of RAM - 2hours and 23 minutes. But it built without any changes. Perhaps the CI is just timing out after 2 hours?

$ brew install --build-from-source dotnet@8
dotnet@8  is already installed but outdated (so it will be upgraded).
==> Fetching downloads for: dotnet@8
==> Fetching dependencies for dotnet@8: pcre2 and grep
==> Downloading https://ghcr.io/v2/homebrew/core/pcre2/manifests/10.47
######################################################################### 100.0%
==> Fetching pcre2
==> Downloading https://ghcr.io/v2/homebrew/core/pcre2/blobs/sha256:a9a5f8749a64
######################################################################### 100.0%
==> Downloading https://ghcr.io/v2/homebrew/core/grep/manifests/3.12
######################################################################### 100.0%
==> Fetching grep
==> Downloading https://ghcr.io/v2/homebrew/core/grep/blobs/sha256:742da3d1e04f2
######################################################################### 100.0%
==> Fetching dotnet@8
==> Downloading https://github.com/dotnet/dotnet/releases/download/v8.0.121/rele
==> Downloading from https://release-assets.githubusercontent.com/github-product
######################################################################### 100.0%
==> Downloading https://github.com/dotnet/dotnet/archive/refs/tags/v8.0.121.tar.
==> Downloading from https://codeload.github.com/dotnet/dotnet/tar.gz/refs/tags/
# #  #                                     -=O=-                                
==> Installing dependencies for dotnet@8: pcre2 and grep
==> Installing dotnet@8 dependency: pcre2
==> Downloading https://ghcr.io/v2/homebrew/core/pcre2/manifests/10.47
Already downloaded: /Users/mstone/Library/Caches/Homebrew/downloads/43e006145d881575c409981c8f01b0da6e06eff7265402874591a1cb91e3531d--pcre2-10.47.bottle_manifest.json
==> Pouring pcre2--10.47.tahoe.bottle.tar.gz
🍺  /usr/local/Cellar/pcre2/10.47: 244 files, 7.0MB
==> Installing dotnet@8 dependency: grep
==> Downloading https://ghcr.io/v2/homebrew/core/grep/manifests/3.12
Already downloaded: /Users/mstone/Library/Caches/Homebrew/downloads/3c88d909bb441e9a74fb4401798a493778d342bfba844e5c40d499b07e9547c4--grep-3.12.bottle_manifest.json
==> Pouring grep--3.12.sonoma.bottle.tar.gz
🍺  /usr/local/Cellar/grep/3.12: 18 files, 1017.7KB
==> Installing dotnet@8
==> ./prep.sh
==> ./build.sh --clean-while-building --online --release-manifest release.json
==> tar --extract --file /private/tmp/dotnetA8-20251022-16786-njwupp/dotnet-8.0.
==> Caveats
For other software to find dotnet you may need to set:
  export DOTNET_ROOT="/usr/local/opt/dotnet@8/libexec"

dotnet@8 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

If you need to have dotnet@8 first in your PATH, run:
  echo 'export PATH="/usr/local/opt/dotnet@8/bin:$PATH"' >> /Users/mstone/.bash_profile
==> Summary
🍺  /usr/local/Cellar/dotnet@8/8.0.121: 4,082 files, 449.7MB, built in 143 minutes 11 seconds
==> Running `brew cleanup dotnet@8`...
Disable this behaviour by setting `HOMEBREW_NO_INSTALL_CLEANUP=1`.
Hide these hints with `HOMEBREW_NO_ENV_HINTS=1` (see `man brew`).
Removing: /usr/local/Cellar/dotnet@8/8.0.15... (4,082 files, 450.3MB)
==> Caveats
Bash completion has been installed to:
  /usr/local/opt/dotnet@8/etc/bash_completion.d
==> dotnet@8
For other software to find dotnet you may need to set:
  export DOTNET_ROOT="/usr/local/opt/dotnet@8/libexec"

dotnet@8 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

[ocmstone]

I saw similar results and a successful build with Sequoia 15.6.1 on an iMac Pro w/16 processors and 32GB - 1hour 49 minutes

[p-linnane]

It's not just the build we're concerned with. We also have a test block to ensure the build is working properly. Our tests failed on the run @ZhongRuoyu kicked off yesterday. You can view the logs here if you think you can help: https://github.com/Homebrew/homebrew-core/actions/runs/18695261576/job/53310996464

[ocmstone]

It looks like this is just a beast of formula! And forgive my ignorance, but it at line 116 in the "Full test dotnet@8 output" under the "Run brew test-bot" the build image appears to have run out of memory: "Stack overflow."