don't know how to build these paths:
  /nix/store/9bxwbl93nljy372sssygncjlfxbkj8m9-iets-fmt-0.2.0.drv
warning: ignoring the client-specified setting 'store', because it is a restricted setting and you are not a trusted user
building '/nix/store/9bxwbl93nljy372sssygncjlfxbkj8m9-iets-fmt-0.2.0.drv' on farm.numtide.com:50051
iets-fmt-0.2.0> bld1: building 9bxwbl93nljy372sssygncjlfxbkj8m9-iets-fmt-0.2.0.drv
iets-fmt-0.2.0> cargoVendorDir not set, will not automatically configure vendored sources
iets-fmt-0.2.0> cargoArtifacts not set, will not reuse any cargo artifacts
iets-fmt-0.2.0> Running phase: unpackPhase
iets-fmt-0.2.0> unpacking source archive /nix/store/a28krxxy5hjz7mk3q4v1rdbk4n3dyd9k-source
iets-fmt-0.2.0> source root is source
iets-fmt-0.2.0> Running phase: patchPhase
iets-fmt-0.2.0> Executing configureCargoCommonVars
iets-fmt-0.2.0> Running phase: updateAutotoolsGnuConfigScriptsPhase
iets-fmt-0.2.0> Running phase: configurePhase
iets-fmt-0.2.0> default configurePhase, nothing to do
iets-fmt-0.2.0> Running phase: buildPhase
iets-fmt-0.2.0> +++ command cargo --version
iets-fmt-0.2.0> cargo 1.99.0 (5f94df478 2026-08-27)
iets-fmt-0.2.0> +++ command cargo fmt -- --check
iets-fmt-0.2.0> Diff in /build/source/src/compile/mod.rs:73:
iets-fmt-0.2.0>  /// Intermediate attrpath-merged binding tree, mirroring Nix's `addAttr`.
iets-fmt-0.2.0>  /// Every variable reference is a `Var` or an `inherit` name.
iets-fmt-0.2.0>  fn var_uses(ast: &Ast) -> FxHashMap<Sym, Vec<u32>> {
iets-fmt-0.2.0> -    let vars = ast.exprs.iter().zip(&ast.spans).filter_map(|(e, s)| match e {
iets-fmt-0.2.0> -        Expr::Var(v) => Some((*v, s)),
iets-fmt-0.2.0> -        _ => None,
iets-fmt-0.2.0> -    });
iets-fmt-0.2.0> +    let vars = ast
iets-fmt-0.2.0> +        .exprs
iets-fmt-0.2.0> +        .iter()
iets-fmt-0.2.0> +        .zip(&ast.spans)
iets-fmt-0.2.0> +        .filter_map(|(e, s)| match e {
iets-fmt-0.2.0> +            Expr::Var(v) => Some((*v, s)),
iets-fmt-0.2.0> +            _ => None,
iets-fmt-0.2.0> +        });
iets-fmt-0.2.0>      let inherits = ast.names.iter().map(|(v, s)| (*v, s));
iets-fmt-0.2.0>      let mut m: FxHashMap<Sym, Vec<u32>> = FxHashMap::default();
iets-fmt-0.2.0>      for (v, s) in vars.chain(inherits) {
error: Cannot build '/nix/store/9bxwbl93nljy372sssygncjlfxbkj8m9-iets-fmt-0.2.0.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/71mzfbh5chdpq0yvqimm6fzd0gsx6zvy-iets-fmt-0.2.0
       Last 25 log lines:
       > Running phase: configurePhase
       > default configurePhase, nothing to do
       > Running phase: buildPhase
       > +++ command cargo --version
       > cargo 1.99.0 (5f94df478 2026-08-27)
       > +++ command cargo fmt -- --check
       > Diff in /build/source/src/compile/mod.rs:73:
       >  /// Intermediate attrpath-merged binding tree, mirroring Nix's `addAttr`.
       >  /// Every variable reference is a `Var` or an `inherit` name.
       >  fn var_uses(ast: &Ast) -> FxHashMap<Sym, Vec<u32>> {
       > -    let vars = ast.exprs.iter().zip(&ast.spans).filter_map(|(e, s)| match e {
       > -        Expr::Var(v) => Some((*v, s)),
       > -        _ => None,
       > -    });
       > +    let vars = ast
       > +        .exprs
       > +        .iter()
       > +        .zip(&ast.spans)
       > +        .filter_map(|(e, s)| match e {
       > +            Expr::Var(v) => Some((*v, s)),
       > +            _ => None,
       > +        });
       >      let inherits = ast.names.iter().map(|(v, s)| (*v, s));
       >      let mut m: FxHashMap<Sym, Vec<u32>> = FxHashMap::default();
       >      for (v, s) in vars.chain(inherits) {
       For full logs, run:
         nix log /nix/store/9bxwbl93nljy372sssygncjlfxbkj8m9-iets-fmt-0.2.0.drv