fix(launch): add --no-build-isolation to open_clip and requirements installs#17371
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lfl1337 wants to merge 1 commit intoAUTOMATIC1111:devfrom
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fix(launch): add --no-build-isolation to open_clip and requirements installs#17371lfl1337 wants to merge 1 commit intoAUTOMATIC1111:devfrom
lfl1337 wants to merge 1 commit intoAUTOMATIC1111:devfrom
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…nstalls Commit 76759a1 added --no-build-isolation to the clip install to fix BackendUnavailable errors with pip 26+ on embedded/portable Python environments, but the same flag was missing from open_clip and the requirements installs. open_clip (GitHub ZIP) and jsonmerge (in requirements_versions.txt) are source distributions that pip must build. With pip 26+, the isolated build environment fails to import setuptools.build_meta, causing: BackendUnavailable: Cannot import 'setuptools.build_meta' Adding --no-build-isolation to these calls mirrors the existing fix for clip and allows pip to use the already-installed setuptools (69.5.1, pinned in requirements_versions.txt) directly. Fixes startup failures on portable/embedded Python 3.10.6 installs (e.g. sd.webui one-click package) with pip 26+. Related: AUTOMATIC1111#17201 AUTOMATIC1111#17284 AUTOMATIC1111#17287 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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What was changed?
Added
--no-build-isolationto theopen_clipandrequirementspip install calls inprepare_environment(), mirroring the existing flag already applied toclip.Why?
Commit 76759a1 fixed CLIP installation failures (#17201, #17284, #17287) by adding
--no-build-isolationto theclipinstall. The same flag was missing from two other install calls in the same block:open_clip— installed from a GitHub ZIP (source distribution)requirements_versions.txt— containsjsonmerge==1.8.0(source distribution, no binary wheel)With pip 26+, the isolated build environment fails to import
setuptools.build_metafor source distributions:This causes a complete startup failure on portable/embedded Python 3.10.6 environments (e.g. the sd.webui one-click package) after pip auto-updates to 26+.
Using
--no-build-isolationlets pip use the already-installedsetuptools==69.5.1(pinned as line 1 ofrequirements_versions.txt) directly, avoiding the broken isolated build environment.How to reproduce
get-pip.py)run.bat— startup fails withBackendUnavailable: Cannot import 'setuptools.build_meta'How to test
Run
run.baton a portable sd.webui installation with pip 26+ — startup completes successfully.Checklist