`cargo $tool` produces `ENOENT` for all binutils

[jazzpi]

I'm trying to work through the Embedded Rust Book. After cloning cortex-m-quickstart (and checking out the last pre-deprecation commit), I can build the project just fine. But for some reason, whenever I try to execute a binutil via cargo $tool, I get an ENOENT even though the tool is installed and in my $PATH:

$ cargo size -v -- --help
"rust-size" "--help"
error: No such file or directory (os error 2)
$ "rust-size" "--help"
OVERVIEW: LLVM object size dumper
...
$ type rust-size
rust-size is /home/jasper/.cargo/bin/rust-size

I suspect this is somehow related to the fact I'm using Nix, so here's some details on my installation:

I've installed rustup using this flake (used via nix develop /path/to/flake-dir):

# Adapted from https://wiki.nixos.org/wiki/Rust#Installation_via_rustup
{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs =
    {
      nixpkgs,
      flake-utils,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
        };
      in
      with pkgs;
      {
        devShells.default = mkShell {
          strictDeps = true;
          nativeBuildInputs = [
            rustup
            rustPlatform.bindgenHook
            pkg-config
          ];
          buildInputs = [
            # Libraries here
            openssl
          ];
          RUSTC_VERSION = "stable";
          shellHook = ''
            export PATH="''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-${stdenv.hostPlatform.rust.rustcTarget}/bin:''${CARGO_HOME:-~/.cargo}/bin:$PATH"
          '';
        };
      }
    );
}

Afterwards, I ran

rustup default stable
rustup target add thumbv7em-none-eabihf
rustup target add thumbv7m-none-eabi
rustup component add llvm-tools
cargo install cargo-binutils

[Emilgardis]

I can't remember if we do extended logging with -v -v could you try that?

[jazzpi]

Unfortunately that doesn't output anything more.

I found something fun though: When I run cargo size under strace, it works fine:

$ strace -f -e trace=execve -s 4096 cargo size -v -v -- --help
execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/cargo", ["cargo", "size", "-v", "-v", "--", "--help"], 0x7ffcf4a8faf0 /* 157 vars */) = 0
execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/.rustup-wrapped", ["cargo", "size", "-v", "-v", "--", "--help"], 0x1243a2a0 /* 158 vars */) = 0
execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo", "size", "-v", "-v", "--", "--help"], 0x5631d2df4290 /* 162 vars */) = 0
execve("/home/jasper/.cargo/bin/cargo-size", ["/home/jasper/.cargo/bin/cargo-size", "size", "-v", "-v", "--", "--help"], 0x563d0ece1cb0 /* 165 vars */) = 0
strace: Process 18153 attached
[pid 18153] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo", "metadata", "--format-version", "1"], 0x7ffda9546550 /* 165 vars */) = 0
strace: Process 18154 attached
[pid 18154] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", "-vV"], 0x7ffe2ccd95e0 /* 165 vars */) = 0
strace: Process 18155 attached
[pid 18155] +++ exited with 0 +++
[pid 18154] +++ exited with 0 +++
[pid 18153] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18154, si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 18156 attached
[pid 18156] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", "-", "--crate-name", "___", "--print=file-names", "--crate-type", "bin", "--crate-type", "rlib", "--crate-type", "dylib", "--crate-type", "cdylib", "--crate-type", "staticlib", "--crate-type", "proc-macro", "--print=sysroot", "--print=split-debuginfo", "--print=crate-name", "--print=cfg", "-Wwarnings"], 0x55c6416ec380 /* 165 vars */) = 0
strace: Process 18157 attached
strace: Process 18158 attached
strace: Process 18159 attached
[pid 18158] +++ exited with 0 +++
[pid 18159] +++ exited with 0 +++
[pid 18157] +++ exited with 0 +++
[pid 18156] +++ exited with 0 +++
[pid 18153] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18156, si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
[pid 18153] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18153, si_uid=1000, si_status=0, si_utime=1 /* 0.01 s */, si_stime=1 /* 0.01 s */} ---
"rust-size" "--help"
strace: Process 18160 attached
[pid 18160] execve("/home/jasper/.cargo/bin/rust-size", ["rust-size", "--help"], 0x7ffda9546550 /* 165 vars */) = 0
strace: Process 18161 attached
[pid 18161] execve("/home/jasper/.cargo/bin/rustc", ["rustc", "--print", "sysroot"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18161] execve("~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["rustc", "--print", "sysroot"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18161] execve("~/.cargo/bin/rustc", ["rustc", "--print", "sysroot"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18161] execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/rustc", ["rustc", "--print", "sysroot"], 0x7fff4d17cc00 /* 165 vars */) = 0
[pid 18161] execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/.rustup-wrapped", ["rustc", "--print", "sysroot"], 0x7ffd9cd31398 /* 165 vars */) = 0
[pid 18161] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", "--print", "sysroot"], 0x5590a19ed680 /* 165 vars */) = 0
strace: Process 18162 attached
strace: Process 18163 attached
strace: Process 18164 attached
[pid 18163] +++ exited with 0 +++
[pid 18162] +++ exited with 0 +++
[pid 18164] +++ exited with 0 +++
[pid 18161] +++ exited with 0 +++
[pid 18160] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18161, si_uid=1000, si_status=0, si_utime=2 /* 0.02 s */, si_stime=2 /* 0.02 s */} ---
strace: Process 18165 attached
[pid 18165] execve("/home/jasper/.cargo/bin/rustc", ["rustc", "-vV"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18165] execve("~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["rustc", "-vV"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18165] execve("~/.cargo/bin/rustc", ["rustc", "-vV"], 0x7fff4d17cc00 /* 165 vars */) = -1 ENOENT (No such file or directory)
[pid 18165] execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/rustc", ["rustc", "-vV"], 0x7fff4d17cc00 /* 165 vars */) = 0
[pid 18165] execve("/nix/store/p54c4fmbvlyhi6ig9bw64qchfjpqixp6-rustup-1.27.1/bin/.rustup-wrapped", ["rustc", "-vV"], 0x7ffe6d609fc0 /* 165 vars */) = 0
[pid 18165] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc", "-vV"], 0x5569934c2550 /* 165 vars */) = 0
strace: Process 18166 attached
[pid 18166] +++ exited with 0 +++
[pid 18165] +++ exited with 0 +++
[pid 18160] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18165, si_uid=1000, si_status=0, si_utime=2 /* 0.02 s */, si_stime=2 /* 0.02 s */} ---
strace: Process 18167 attached
[pid 18167] execve("/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-size", ["/home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-size", "--help"], 0x7fff4d17cc00 /* 165 vars */) = 0
[pid 18167] +++ exited with 0 +++
[pid 18160] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18167, si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
[pid 18160] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18160, si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
OVERVIEW: LLVM object size dumper

USAGE: /home/jasper/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-size [options] <input object files>

OPTIONS:
  -A               Alias for --format
  -B               Alias for --format
  --common         Print common symbols in the ELF file. When using Berkeley format, this is added to bss
  -d               Alias for --radix=10
  --format=<value> Specify output format
  --help           Display this help
  -h               Alias for --help
  -m               Alias for --format
  -o               Alias for --radix=8
  --radix=<value>  Print size in radix
  --totals         Print totals of all objects - Berkeley format only
  -t               Alias for --totals
  --version        Display the version
  -x               Alias for --radix=16

OPTIONS (Mach-O specific):
  --arch=<value> architecture(s) from a Mach-O file to dump
  -l             When format is darwin, use long format to include addresses and offsets

Pass @FILE as argument to read options from FILE.
+++ exited with 0 +++