feat: add Nix flake dev shell for local development#205
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jfernandez merged 1 commit intomainfrom Mar 28, 2026
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Building bpftop requires system libraries (libelf, zlib, libbpf) and a clang that can target BPF. Rather than relying on cross/Docker or manually installing deps, this adds a Nix flake devShell that provides everything needed. It activates automatically via direnv. Nix's cc-wrapper injects hardening flags that break BPF compilation, so we selectively disable the incompatible ones (zerocallusedregs, shadowstack, pacret) — the same approach systemd uses in nixpkgs.
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Provides a reproducible development environment with all system dependencies (clang, elfutils, zlib, libbpf) needed to build bpftop without cross or Docker. Uses selective hardeningDisable for BPF-incompatible flags (the same pattern used by systemd in nixpkgs). Activates automatically via direnv with
use flake.