Could not find `naked_asm` in `arch`

[micartey]

When I try to update my flake, I get this error:

 ...
 Compiling default-env v0.1.1
       > error[E0433]: failed to resolve: could not find `naked_asm` in `arch`
       >    --> src/arch.rs:145:25
       >     |
       > 145 |             core::arch::naked_asm!(
       >     |                         ^^^^^^^^^ could not find `naked_asm` in `arch`
       >
       > For more information about this error, try `rustc --explain E0433`.
       > error: could not compile `nix-ld` (bin "nix-ld") due to 1 previous error

The probable cause is this MR that has been merged: #109

My current workaround is to always revert my lock file to:

    "nix-ld": {
      "inputs": {
        "nixpkgs": ["nixpkgs"]
      },
      "locked": {
        "lastModified": 1734943676,
        "narHash": "sha256-j82D0J4XkteyE/nJ+Wn+9eSdnM5RXz+1vWR3XvRN7nY=",
        "owner": "Mic92",
        "repo": "nix-ld",
        "rev": "76cbe0384ce6be86cba9310f617ad3abecc7f67b",
        "type": "github"
      },
      "original": {
        "owner": "Mic92",
        "repo": "nix-ld",
        "type": "github"
      }
    },

[Mic92]

You need a nixpkgs version with rustc 1.83 i.e. nixpkgs-unstable or use nix-ld from your own nixpkgs version.

[micartey]

That was not the issue 😅

I needed to change nix-ld to the following lines:

  programs.nix-ld = {
    enable = true;
    dev.enable = false;
  };

[OuthBack]

@micartey solution for the following error worked well.

error: builder for '/nix/store/wsrxspsf738yzapw5dj7za8gimqbqlv5-nix-ld.drv' failed with exit code 101;
       last 25 log lines:
       > warning[E0133]: use of inline assembly is unsafe and requires unsafe block
       >    --> src/arch.rs:150:5
       >     |
       > 150 | /     core::arch::naked_asm!(
       > 151 | |         "lea r10, [rip + {context}]",
       > 152 | |         "mov r11, [r10 + {size} * 1]", // .env_entry
       > 153 | |         "test r11, r11",
       > ...   |
       > 160 | |         size = const core::mem::size_of::<*const u8>(),
       > 161 | |     )
       >     | |_____^ use of inline assembly
       >     |
       >     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
       >     = note: inline assembly is entirely unchecked and can cause undefined behavior
       > note: an unsafe function restricts its caller, but its body is safe by default
       >    --> src/arch.rs:149:1
       >     |
       > 149 | unsafe extern "C" fn entry_trampoline() -> ! {
       >     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >     = note: `#[warn(unsafe_op_in_unsafe_fn)]` on by default
       >
       > Some errors have detailed explanations: E0133, E0658.
       > For more information about an error, try `rustc --explain E0133`.
       > warning: `nix-ld` (bin "nix-ld") generated 1 warning
       > error: could not compile `nix-ld` (bin "nix-ld") due to 3 previous errors; 1 warning emitted
       For full logs, run:
         nix log /nix/store/wsrxspsf738yzapw5dj7za8gimqbqlv5-nix-ld.drv
error: 1 dependencies of derivation '/nix/store/0cxjcch448b0ghm4nbkih0kbmmbdsgb7-tmpfiles.d.drv' failed to build
error: 1 dependencies of derivation '/nix/store/226bjd5jx4awiczag1bvkwj5dcchphbw-etc.drv' failed to build
error: 1 dependencies of derivation '/nix/store/27js9rcjz7dafl1m11g8lgn3fk1jkzik-nixos-system-nixos-25.05.20250609.88331c1.drv' failed to build