Making `/lib64/ld-linux-x86-64.so.2` available

Development
1

Is there a way that I can make /lib64/ld-linux-x86-64.so.2 available without having to wrap things in a shell or something similar as is discussed in How to deal with `/lib64/ld-linux-x86-64.so.2` missing on NixOS?. I know that that is not how NixOS should be used, but now after a few years I’m done fighting it. For example, if I download a new version of Julia (https://julialang.org/downloads/), then I can run the binary after I have patched bin/julia and libexec/7z. By patching, I mean that I change the interpreter from

$ patchelf --print-interpreter bin/julia
/lib64/ld-linux-x86-64.so.2

to, for example,

$ patchelf --print-interpreter bin/julia
/nix/store/lyl6nysc3i3aqhj6shizjgj0ibnf1pvg-glibc-2.34-210/lib/ld-linux-x86-64.so.2

I don’t think that it makes sense to wrap each the binary invokation in some kind of shell. Literally the only thing is that a symlink is missing.

So, basically, my question is: Can I create a symlink via the NixOS config?

2

Yes, you can.

And I know @gytis-ivaskevicius does or did this in their repository, though I was not able to find it quickly.

Perhaps you have better luck? Or they chime in as usual and just point you to the right location in their config.

3

Yes. Adding

system.activationScripts.ldso = lib.stringAfter [ "usrbinenv" ] ''
    mkdir -m 0755 -p /lib64
    ln -sfn ${pkgs.glibc.out}/lib64/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2.tmp
    mv -f /lib64/ld-linux-x86-64.so.2.tmp /lib64/ld-linux-x86-64.so.2 # atomically replace
  '';

works :partying_face: Thanks @NobbZ and @gytis-ivaskevicius

1 Like
4

There is also: GitHub - Mic92/nix-ld: Run unpatched dynamic binaries on NixOS

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