Hi all, I'm trying to install a package that depends on the cryptography package and getting this error:

error: hash mismatch in fixed-output derivation '/nix/store/llmpxpnnnmiqg889bqqdxh21m84vczi4-cryptography-36.0.2-vendor.tar.gz.drv':
         specified: sha256-kozYXkqt1Wpqyo9GYCwN08J+zV92ZWFJY/f+rulxmeQ=
            got:    sha256-6C4N445h4Xf2nCc9rJWpSZaNPilR9GfgbmKvNlSIFqg=

I see here that a number of modifications are applied for this package already, so maybe it's just a matter of them being outdated?

In reply to @dminuoso:matrix.org
I am a bit baffled as to why it cant find --ldap_r

Hello.
I have an issue with the python-magic package (version 0.4.37)

substitute(): ERROR: file 'magic/loader.py' does not exist

It seems that the patch described in poetry2nix doesn’t work : https://github.com/nix-community/poetry2nix/blob/68da2697e1cf1376f8b6dc6121e1b5df08edcab8/overrides/default.nix#L1767-L1770

Do you know what I could do and if I should open an issue ?

Hello.
I have an issue with the python-magic package (version 0.4.37)

substitute(): ERROR: file 'magic/loader.py' does not exist

It seems that the patch described in poetry2nix doesn’t work : https://github.com/nix-community/poetry2nix/blob/68da2697e1cf1376f8b6dc6121e1b5df08edcab8/overrides/default.nix#L1767-L1770

It is strange : the magic/loader.py file exists in the python-magic repository 🤔

Do you know what I could do and if I should open an issue ?

In reply to @thoth101010:matrix.org

Hello.
I have an issue with the python-magic package (version 0.4.37)

substitute(): ERROR: file 'magic/loader.py' does not exist

It seems that the patch described in poetry2nix doesn’t work : https://github.com/nix-community/poetry2nix/blob/68da2697e1cf1376f8b6dc6121e1b5df08edcab8/overrides/default.nix#L1767-L1770

It is strange : the magic/loader.py file exists in the python-magic repository 🤔

Do you know what I could do and if I should open an issue ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the pip version ?

In reply to @thoth101010:matrix.org

Hello.
I have an issue with the python-magic package (version 0.4.37)

substitute(): ERROR: file 'magic/loader.py' does not exist

It seems that the patch described in poetry2nix doesn’t work : https://github.com/nix-community/poetry2nix/blob/68da2697e1cf1376f8b6dc6121e1b5df08edcab8/overrides/default.nix#L1767-L1770

It is strange : the magic/loader.py file exists in the python-magic repository 🤔

Do you know what I could do and if I should open an issue ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I guess that I should write the override myself ?should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the pip version ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I guess that I should write the override myself ?should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the library version ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I guess that I should write the override myself ?should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the library version ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I guess that I should write the override myself ?should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the library version ?

I found out that the file it edits exists in develop but not in the last stable version of python-magic.
How can I use poetry2nix with an old version of override ? I guess that I should write the override myself ?should rewrite it myself I think ?

Isn’t it counterintuitive to have a replacement not suitable to the library version ?
edit: wrong

Noooooo. I achieved to use the sdist by using

          overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend (self: super: {
            python-magic = super.python-magic.overridePythonAttrs (
              old: {
                postPatch = ''
                  substituteInPlace magic/loader.py \
                    --replace "'libmagic.so.1'" "'${pkgs.lib.getLib pkgs.file}/lib/libmagic.so.1'"
                '';
                pythonImportsCheck = old.pythonImportsCheck or [] ++ ["magic"];
                src = super.pythonPackages.fetchPypi {
                  pname = "python-magic";
                  version = "0.4.27";
                  sha256 = "c1ba14b08e4a5f5c31a302b7721239695b2f0f058d125bd5ce1ee36b9d9d3c3b";
                };
              }
            );
          });

But it doesn’t work either 😭

And in the log I have

Using wheelUnpackPhase

But it’s not a wheel 🤔 (nix show-derivation shows that the file is a tar.gz and the hash is for the tar.gz)

Does anyone have an idea why it might not work ? Is there a way to "debug" the build and see wich files are there whene the substituteInPlace is lanched ?

In reply to @thoth101010:matrix.org
Is it possible that the issue is that I use preferWheels = true ?
How can I specify that I want to use sdist for one package ?
(if I don’t use wheels I have issues with hatchling/hatch-vcs 🤕)

In reply to @gmacon:matrix.org
You should be able to override preferWheel = false for a single package if I'm reading this correctly: https://github.com/nix-community/poetry2nix/blob/abc47c71a4920e654e7b2e4261e3e6399bbe2be6/mk-poetry-dep.nix#L24. Alternatively, you could use preferWheels = false and override preferWheel = true for hatchling

Thank you for your answer !

I couldn’t use the preferWheel option:

   overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend (self: super: {
     python-magic = super.python-magic.override {
       preferWheel = false;
     };

The issue isn’t with hatchling but with a package requiring hatchling. It is fixed in master but a new poetry2nix version hasn’t been release yet.
I solved this issue but I’ve had other issues : python-cryptography not building (something with rust build not having source), and a pip package requiring another pip package for build.

For now, I will continue to use poetry without poetry2nix by patching the loader.py file myself in the poetry venv dir. It is dirty but is the easiest solution 😔

In reply to @gmacon:matrix.org
You should be able to override preferWheel = false for a single package if I'm reading this correctly: https://github.com/nix-community/poetry2nix/blob/abc47c71a4920e654e7b2e4261e3e6399bbe2be6/mk-poetry-dep.nix#L24. Alternatively, you could use preferWheels = false and override preferWheel = true for hatchling

Thank you for your answer !

I couldn’t make the preferWheel option :

   overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend (self: super: {
     python-magic = super.python-magic.override {
       preferWheel = false;
     };

The issue isn’t with hatchling but with a package requiring hatchling. It is fixed in master but a new poetry2nix version hasn’t been release yet.
I solved this issue but I’ve had other issues : python-cryptography not building (something with rust build not having source), and a pip package requiring another pip package for build.

For now, I will continue to use poetry without poetry2nix by patching the loader.py file myself in the poetry venv dir. It is dirty but is the easiest solution 😔

Thank you for your answer !

I couldn’t make the preferWheel option work :

   overrides = pkgs.poetry2nix.defaultPoetryOverrides.extend (self: super: {
     python-magic = super.python-magic.override {
       preferWheel = false;
     };

For the preferWheels = false : the issue isn’t with hatchling but with a package requiring hatchling. It is fixed in master but a new poetry2nix version hasn’t been release yet.
I solved this issue but I’ve had other issues : python-cryptography not building (something with rust build not having source), and a pip package requiring another pip package for build.

For now, I will continue to use poetry without poetry2nix by patching the loader.py file myself in the poetry venv dir. It is dirty but is the easiest solution 😔