Nixpkgs: dontUnpack doesnt prevent src from unpacking / doesnt disable unpackPhase

[srghma]

with file

echo "asdfasdf" > text

with derivation

let
  pkgs = import <nixpkgs> {};
in

with pkgs;

stdenv.mkDerivation {
  name = "asdfasdf";

  version = "0.1";

  src = ./text;

  dontUnpack = true; # not fu**** working

  installPhase = ''
    echo "not even executed"
  '';
}

I have an error

$ nix-build tmp.nix
these derivations will be built:
  /nix/store/jg78zmy6qc29s5sgkligpbr88zidv41k-asdfasdf.drv
building '/nix/store/jg78zmy6qc29s5sgkligpbr88zidv41k-asdfasdf.drv'...
unpacking sources
unpacking source archive /nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text
do not know how to unpack source archive /nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text
builder for '/nix/store/jg78zmy6qc29s5sgkligpbr88zidv41k-asdfasdf.drv' failed with exit code 1
error: build of '/nix/store/jg78zmy6qc29s5sgkligpbr88zidv41k-asdfasdf.drv' failed

why dontUnpack not working?

expected output

unpacking sources
unpacking source archive /nix/store/3hnf69pky6mqaxv4jxly9fyywqpq6iml-FoxitReader
do not know how to unpack source archive /nix/store/3hnf69pky6mqaxv4jxly9fyywqpq6iml-FoxitReader

should not be printed

---

$ cat /nix/store/jg78zmy6qc29s5sgkligpbr88zidv41k-asdfasdf.drv
Derive([("out","/nix/store/dc76i7sciyhmmlnl317s2w0p6nj396p1-asdfasdf","","")],[("/nix/store/1kircip4wskspsqqzxbmh6ss73iqh9ah-bash-4.4-p23.drv",["out"]),("/nix/store/fjhmb2fr7fx5azg89ldqywkmj5604z08-stdenv-linux.drv",["out"])],["/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh","/nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text"],"x86_64-linux","/nix/store/cinw572b38aln37glr0zb8lxwrgaffl4-bash-4.4-p23/bin/bash",["-e","/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"],[("buildInputs",""),("builder","/nix/store/cinw572b38aln37glr0zb8lxwrgaffl4-bash-4.4-p23/bin/bash"),("configureFlags",""),("depsBuildBuild",""),("depsBuildBuildPropagated",""),("depsBuildTarget",""),("depsBuildTargetPropagated",""),("depsHostHost",""),("depsHostHostPropagated",""),("depsTargetTarget",""),("depsTargetTargetPropagated",""),("doCheck",""),("doInstallCheck",""),("dontUnpack","1"),("installPhase","echo \"not even executed\"\n"),("name","asdfasdf"),("nativeBuildInputs",""),("out","/nix/store/dc76i7sciyhmmlnl317s2w0p6nj396p1-asdfasdf"),("outputs","out"),("propagatedBuildInputs",""),("propagatedNativeBuildInputs",""),("src","/nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text"),("stdenv","/nix/store/xf82nnr3v80bnh8s8w630h5wv52kgm3l-stdenv-linux"),("strictDeps",""),("system","x86_64-linux"),("version","0.1")])

nix-info
system: "x86_64-linux", multi-user?: yes, version: nix-env (Nix) 2.1.3, channels(srghma): "", channels(root): "nixos-19.03.173165.55b8860aa20, nixpkgs-19.09pre186274.104f8a0e1a1, nixpkgs-unstable", nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

---

Also asked here https://stackoverflow.com/questions/57225745/how-to-disable-unpack-phase-to-prevent-error-do-not-know-how-to-unpack-source-a/57228687#57228687

[charles-dyfis-net]

With which specific build of nixpkgs was this observed? Could you provide a copy of your .drv? (I can't reproduce it here).

[srghma]

With which specific build of nixpkgs was this observed? Could you provide a copy of your .drv? (I can't reproduce it here).

Updated the description, you can paste

Derive([("out","/nix/store/dc76i7sciyhmmlnl317s2w0p6nj396p1-asdfasdf","","")],[("/nix/store/1kircip4wskspsqqzxbmh6ss73iqh9ah-bash-4.4-p23.drv",["out"]),("/nix/store/fjhmb2fr7fx5azg89ldqywkmj5604z08-stdenv-linux.drv",["out"])],["/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh","/nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text"],"x86_64-linux","/nix/store/cinw572b38aln37glr0zb8lxwrgaffl4-bash-4.4-p23/bin/bash",["-e","/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"],[("buildInputs",""),("builder","/nix/store/cinw572b38aln37glr0zb8lxwrgaffl4-bash-4.4-p23/bin/bash"),("configureFlags",""),("depsBuildBuild",""),("depsBuildBuildPropagated",""),("depsBuildTarget",""),("depsBuildTargetPropagated",""),("depsHostHost",""),("depsHostHostPropagated",""),("depsTargetTarget",""),("depsTargetTargetPropagated",""),("doCheck",""),("doInstallCheck",""),("dontUnpack","1"),("installPhase","echo \"not even executed\"\n"),("name","asdfasdf"),("nativeBuildInputs",""),("out","/nix/store/dc76i7sciyhmmlnl317s2w0p6nj396p1-asdfasdf"),("outputs","out"),("propagatedBuildInputs",""),("propagatedNativeBuildInputs",""),("src","/nix/store/wwba4yf2422aai9d796r2gfmzj1mvrs5-text"),("stdenv","/nix/store/xf82nnr3v80bnh8s8w630h5wv52kgm3l-stdenv-linux"),("strictDeps",""),("system","x86_64-linux"),("version","0.1")])

to ./my.drv and you will have derivation

[srghma]

@charles-dyfis-net well, I cant reproduce the issue with https://nixos.org/channels/nixpkgs-unstable

dontUnpack = true is working here, no unpacking is executed, preUnpack and postUnpack phases are also not executed as expected

[srghma]

this is not working on nixpkgs version 19.03.173165.55b8860aa20, but working on 19.09.pre186274.104f8a0e1a1

[srghma]

dont know if the fix should be pushed to older versions of nixpkgs @charles-dyfis-net

[FRidh]

Many of the dont<Phase> attributes were not yet implemented in the current and past stable releases. So, if you intend to use it with the current stable or older stables, use instead unpackPhase = ":".