clicommand/agent_start.go: Use /usr/bin/env bash as default shell#3661
Merged
zhming0 merged 1 commit intobuildkite:mainfrom Jan 13, 2026
Merged
clicommand/agent_start.go: Use /usr/bin/env bash as default shell#3661zhming0 merged 1 commit intobuildkite:mainfrom
/usr/bin/env bash as default shell#3661zhming0 merged 1 commit intobuildkite:mainfrom
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Use `/usr/bin/env bash` rather than `/bin/bash` to locate bash for the default shell in a Linux agent. This improves portability for running agents on NixOS and GNU Guix hosts, where /bin/bash is not present, but /usr/bin/env is present.
This was referenced Jan 13, 2026
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Description
Use
/usr/bin/env bashrather than/bin/bashto locate bash for the default shell in a Linux agent.This improves portability for running agents on NixOS and GNU Guix hosts, where /bin/bash is not present, but /usr/bin/env is present.
Context
"Hello world" builds failed on an agent running on GNU Guix, and presumably it would also fail on NixOS for the same reason:
Changes
Uses
/usr/bin/env bashto instantiate the bash shell based on the $PATH rather than presuming/bin/bashThe presence of
/usr/bin/envat that location is a de-facto standard which can be relied on for portability.Testing
go test ./...). Buildkite employees may check this if the pipeline has run automatically.go tool gofumpt -extra -w .)Disclosures / Credits
I did not use AI tools at all