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- Fix Tectonic arm64: use aarch64-unknown-linux-musl (not gnu) - Fix Tectonic download URL to use proper versioned path - Add BuildKit syntax directive and apt cache mounts - Combine apt install layers for build deps - Add --no-install-recommends to reduce image size - Use native arm64 runner (ubuntu-24.04-arm) instead of QEMU - Build archs in parallel on native runners, then merge manifests - Use registry-based caching for faster rebuilds The arm64 build was failing because Tectonic only provides musl-based binaries for aarch64, not glibc ones. Build time should improve significantly: - Native arm64 runner vs QEMU emulation (~10x faster) - Registry caching for layer reuse across builds - BuildKit apt cache mounts 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Switched from glibc to musl binaries for amd64 as well since --no-install-recommends doesn't include libgraphite2 and other libraries that the glibc binary needs. musl binaries are statically linked so they work without additional runtime dependencies. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
ubuntu-24.04-arminstead of QEMU emulation--no-install-recommendsPerformance Comparison
Root Cause
aarch64-unknown-linux-muslbinaries, notaarch64-unknown-linux-gnu--no-install-recommendsremovedlibgraphite2.so.3needed by glibc binariesSolution
Test plan
🤖 Generated with Claude Code