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86 lines
2.8 KiB
Org Mode
86 lines
2.8 KiB
Org Mode
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:PROPERTIES:
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:ID: 8f23f862-a19a-4a13-8d8f-69c280a8e072
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:END:
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#+title: Nix derivations
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#+date: 2021-07-18 23:16:39 +08:00
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#+date_modified: 2021-07-18 23:16:39 +08:00
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#+language: en
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Derivations are recipes for the Nix build daemon how to build the package.
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At a glance, this is the equivalent to manifests from [[id:ecee1a61-3d5c-4c8f-a205-67e5278beed6][Flatpak packages]] or Guix packages.
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The following code block shows what a derivation looks like.
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#+begin_src bash :cache yes
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nix show-derivation nixpkgs.hello
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#+end_src
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#+results[e489b584c0de1eac206a48340452807005a9bf87]:
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#+begin_example
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{
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"/nix/store/7xcq1j6kxry9p5scmgccifqp1m57ha17-hello-2.10.drv": {
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"outputs": {
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"out": {
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"path": "/nix/store/kzq2f6pqb3ig89278n3c21g6x4y3pghs-hello-2.10"
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}
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},
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"inputSrcs": [
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"/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"
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],
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"inputDrvs": {
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"/nix/store/aq6m16jyrdpz2frivygw0502lkhyv271-stdenv-linux.drv": [
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"out"
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],
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"/nix/store/hhq1cbwwjm28bp7bnr9ivlvgah7988xb-hello-2.10.tar.gz.drv": [
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"out"
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],
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"/nix/store/mhgg30w6ayhbvnp03z8gx4c92n67ajg6-bash-4.4-p23.drv": [
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"out"
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]
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},
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"platform": "x86_64-linux",
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"builder": "/nix/store/26a78ync552m8j4sbjavhvkmnqir8c9y-bash-4.4-p23/bin/bash",
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"args": [
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"-e",
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"/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"
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],
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"env": {
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"buildInputs": "",
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"builder": "/nix/store/26a78ync552m8j4sbjavhvkmnqir8c9y-bash-4.4-p23/bin/bash",
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"configureFlags": "",
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"depsBuildBuild": "",
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"depsBuildBuildPropagated": "",
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"depsBuildTarget": "",
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"depsBuildTargetPropagated": "",
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"depsHostHost": "",
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"depsHostHostPropagated": "",
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"depsTargetTarget": "",
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"depsTargetTargetPropagated": "",
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"doCheck": "1",
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"doInstallCheck": "",
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"name": "hello-2.10",
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"nativeBuildInputs": "",
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"out": "/nix/store/kzq2f6pqb3ig89278n3c21g6x4y3pghs-hello-2.10",
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"outputs": "out",
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"patches": "",
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"pname": "hello",
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"propagatedBuildInputs": "",
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"propagatedNativeBuildInputs": "",
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"src": "/nix/store/3x7dwzq014bblazs7kq20p9hyzz0qh8g-hello-2.10.tar.gz",
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"stdenv": "/nix/store/dj40kjgp5lhs55v4hc47vyrarhq4qycz-stdenv-linux",
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"strictDeps": "",
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"system": "x86_64-linux",
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"version": "2.10"
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}
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}
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}
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#+end_example
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While we can create derivations with the [[id:a57e63a7-6daa-4639-910d-c6648df156a3][Nix language]], it is unnecessary and verbose if we use nixpkgs.
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nixpkgs has made the process easier with their standard library.
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- =stdenv.mkDerivation=
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- nixpkgs also comes with several convenient functions/environments for several programming languages and frameworks including Python, Rust, Go, and Nim
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- it also includes environments for common setups such as for clang compiler
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