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josibake merged 1 commit into from
Jun 1, 2026
Merged

nix: add a native devShell flake #37

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1 change: 1 addition & 0 deletions .envrc
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Original file line number Diff line number Diff line change
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use flake
27 changes: 27 additions & 0 deletions flake.lock
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@janb84 janb84 Jun 1, 2026 •
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Would it not create a "lot of" churn to include this ? (I get having stable versions is also nice)

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@josibake josibake Jun 1, 2026

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I'd argue flake.lock is essential for devshells. AFAIU, the lock file is used for the cache, so faster builds, and without the lockfile you're likely to unexpectedly pull in new versions of dependencies (without intending to), which you absolutely don't want while developing.

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56 changes: 56 additions & 0 deletions flake.nix
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{
description = "2140 Bitcoin Core devShell";

inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
};

outputs =
{ nixpkgs, ... }:
let
systems = [
"x86_64-linux"
"aarch64-linux"
"aarch64-darwin"
];
forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f (import nixpkgs { inherit system; }));

mkDevShell =
pkgs:
let
inherit (pkgs) lib;
inherit (pkgs.stdenv) isLinux isDarwin;

nativeBuildInputs = [
pkgs.ccache
pkgs.cmakeCurses # cmakeCurses includes the ccmake tool
pkgs.ninja
pkgs.pkg-config
pkgs.python313
]
++ lib.optionals isLinux [
pkgs.libsystemtap
pkgs.linuxPackages.bcc
pkgs.linuxPackages.bpftrace
];
buildInputs = [
pkgs.boost
pkgs.capnproto
];
in
pkgs.mkShell {
inherit nativeBuildInputs buildInputs;
hardeningDisable = lib.optionals isDarwin [ "stackclashprotection" ];
CMAKE_GENERATOR = "Ninja";
CMAKE_EXPORT_COMPILE_COMMANDS = 1;
LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.capnproto ];
LOCALE_ARCHIVE = lib.optionalString isLinux "${pkgs.glibcLocales}/lib/locale/locale-archive";
};
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in
{
devShells = forAllSystems (pkgs: {
default = mkDevShell pkgs;
});
formatter = forAllSystems (pkgs: pkgs.nixfmt-tree);
};
}
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