this derivation will be built:
  /nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv
building '/nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv' on 'ssh-ng://customer@mac02'
building '/nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 153 files
treefmt-check> emitted 138 files for processing
treefmt-check> formatted 138 files (1 changed) in 80ms
treefmt-check>  M .github/workflows/gc.yml
treefmt-check> diff --git a/.github/workflows/gc.yml b/.github/workflows/gc.yml
treefmt-check> index 2f797c1..bb0488b 100644
treefmt-check> --- a/.github/workflows/gc.yml
treefmt-check> +++ b/.github/workflows/gc.yml
treefmt-check> @@ -2,12 +2,10 @@
treefmt-check>  # branch: PR cache scopes die with the PR, the default-branch scope grows
treefmt-check>  # forever without GC.
treefmt-check>  name: Cache GC
treefmt-check> -
treefmt-check>  # A concurrent GC races another GC's pack deletes; queue runs instead.
treefmt-check>  concurrency:
treefmt-check>    group: hestia-gc
treefmt-check>    cancel-in-progress: false
treefmt-check> -
treefmt-check>  on:
treefmt-check>    schedule:
treefmt-check>      - cron: "23 3 * * 0"
treefmt-check> @@ -17,10 +15,8 @@ on:
treefmt-check>          description: Plan only; do not repack, touch, or delete anything.
treefmt-check>          type: boolean
treefmt-check>          default: false
treefmt-check> -
treefmt-check>  permissions:
treefmt-check>    contents: read
treefmt-check> -
treefmt-check>  jobs:
treefmt-check>    gc:
treefmt-check>      runs-on: ubuntu-latest
error: build of '/nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/9sw1pjslspjc66qlxfp64y5d4h7pgfxy-treefmt-check
       Last 25 log lines:
       > +++ b/.github/workflows/gc.yml
       > @@ -2,12 +2,10 @@
       >  # branch: PR cache scopes die with the PR, the default-branch scope grows
       >  # forever without GC.
       >  name: Cache GC
       > -
       >  # A concurrent GC races another GC's pack deletes; queue runs instead.
       >  concurrency:
       >    group: hestia-gc
       >    cancel-in-progress: false
       > -
       >  on:
       >    schedule:
       >      - cron: "23 3 * * 0"
       > @@ -17,10 +15,8 @@ on:
       >          description: Plan only; do not repack, touch, or delete anything.
       >          type: boolean
       >          default: false
       > -
       >  permissions:
       >    contents: read
       > -
       >  jobs:
       >    gc:
       >      runs-on: ubuntu-latest
       For full logs, run:
         nix log /nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv
error: Cannot build '/nix/store/s3v47bvs8blhm6nsh293493gpa2y5w67-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/9sw1pjslspjc66qlxfp64y5d4h7pgfxy-treefmt-check