/// Extra configuration lines for `/etc/nix.conf`
    #[cfg_attr(feature = "cli", clap(long, action = ArgAction::Append, num_args = 0.., env = "NIX_INSTALLER_EXTRA_CONF", global = true))]
    pub extra_conf: Vec<UrlOrPathOrString>,

I found something that is messed up with flakes:

1. Write src = ./.;
2. On another line write something like something = finalAttrs.src
3. Run nom build

It shows that finalAttrs.src does not match the $src that is unpacked for some reason.

The log outputs will say something like

unpacking source archive /nix/store/6vpcbgxb1lv4xb36i4z0wcns26qkqb0a-ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source
source root is ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Notice that this looks like a store path made from a store path. It seems to be, as both store paths exist. But if you write something like:

echo "${finalAttrs.src}"

you will get:

ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Since I rely on finalAttrs.src == $src I get a derivation failure. This can be fixed if I write something like src = self; from the flake outputs.

I found something that is weird:

1. Write src = ./.;
2. On another line write something like something = finalAttrs.src
3. Run nom build

It shows that finalAttrs.src does not match the $src that is unpacked for some reason.

The log outputs will say something like

unpacking source archive /nix/store/6vpcbgxb1lv4xb36i4z0wcns26qkqb0a-ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source
source root is ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Notice that this looks like a store path made from a store path. It seems to be, as both store paths exist. But if you write something like:

echo "${finalAttrs.src}"

you will get:

ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Since I rely on finalAttrs.src == $src I get a derivation failure. This can be fixed if I write something like src = self; from the flake outputs.

I found something that is weird:

1. Write src = ./.;
2. On another line write something like something = finalAttrs.src
3. Run nom build

It shows that finalAttrs.src does not match the $src that is unpacked for some reason.

The log outputs will say something like

unpacking source archive /nix/store/6vpcbgxb1lv4xb36i4z0wcns26qkqb0a-ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source
source root is ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Notice that this looks like a store path made from a store path. It seems to be, as both store paths exist. But if you write something like:

echo "${finalAttrs.src}"

you will get:

ss7yf0ysfsr45a1811bcyvpkblpnhk1q-source

Since I rely on finalAttrs.src == $src I get a derivation failure. This can be fixed if I write something like src = self; from the flake outputs, as then finalAttrs.src == $src in that case for some reason.

I can't reproduce it using the old cli, I'll try flakes but I doubt it'll affect anything. FWIW this is the derivation I'm trying

{stdenvNoCC }:
stdenvNoCC.mkDerivation (finalAttrs: {
  pname = "repro";
  version = "1";
  src = ./.;
  lol = finalAttrs.src;
  buildPhase = ''
    echo lol = "$lol"
    echo lol = "${finalAttrs.src}"
  '';
  installPhase = ''
    touch $out
  '';
})

and the output is

Running phase: buildPhase
lol = /nix/store/jl7xm5g4yc8larsbyabf07db9p96ljrq-nix-repro
lol = /nix/store/jl7xm5g4yc8larsbyabf07db9p96ljrq-nix-repro