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release.yml: flock apt-get to serialize concurrent coin package jobs #670

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frstrtr merged 1 commit into from
Jul 11, 2026
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release.yml: flock apt-get to serialize concurrent coin package jobs #670

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8 changes: 8 additions & 0 deletions .github/workflows/release.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,15 @@ jobs:

- name: Install system dependencies
if: steps.presence.outputs.exists == '1'
# Serialize apt across the concurrent coin package jobs sharing the one
# c2pool-build self-hosted host. Without this, the 5 Linux matrix cells
# race on /var/lib/apt/lists/lock (and corrupt srcpkgcache.bin), and the
# loser fails before the build starts (e.g. LTC on v0.2.0, run
# 29148852306). flock on a host-wide lock makes apt atomic; on
# github-hosted runners the lock is per-VM and uncontended, so no-op.
run: |
exec {lockfd}>/tmp/c2pool-apt.lock
flock "$lockfd"
sudo apt-get update -qq
sudo apt-get install -y --no-install-recommends \
g++ cmake make libleveldb-dev libsecp256k1-dev
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