$ nix-shell -p nox --run "nox-review wip"
...
Building ./src/lib.rs (image)
Running rustc --crate-name image ./src/lib.rs --crate-type lib -C opt-level=3 -C metadata=2a495c5fd3 -C extra-filename=-2a495c5fd3 --cfg feature="webp" --cfg feature="tiff" --cfg feature="tga" --cfg feature="scoped_threadpool" --cfg feature="ppm" --cfg feature="png_codec" --cfg feature="png" --cfg feature="jpeg-decoder" --cfg feature="jpeg" --cfg feature="ico" --cfg feature="hdr" --cfg feature="gif_codec" --cfg feature="gif" --cfg feature="default" --cfg feature="bmp" --out-dir target/lib --emit=dep-info,link -L dependency=target/deps --extern byteorder=/nix/store/f0mxwv76i36wxxa108vd5hw6hiflyzvj-rust_byteorder-1.0.0/lib/libbyteorder-79a80d72eb.rlib --extern enum_primitive=/nix/store/5xgxrsnzk237ynx88g13dr4jz5q3xcyn-rust_enum_primitive-0.1.1/lib/libenum_primitive-fc773b47c3.rlib --extern glob=/nix/store/qxg8ippj187va05zzx0z1lmsfmjcsh82-rust_glob-0.2.11/lib/libglob-67202cca89.rlib --extern num_iter=/nix/store/13i0wmdcpzayrwsx591bq8nzxd15l0kw-rust_num-iter-0.1.33/lib/libnum_iter-da6f8e2e13.rlib --extern num_rational=/nix/store/ck8a7xinrkaf6zxm07vhhn0lmq6i8ghg-rust_num-rational-0.1.36/lib/libnum_rational-6944f525fb.rlib --extern num_traits=/nix/store/kpm94jkihj6hdb8bqv1533wzj7xmpn57-rust_num-traits-0.1.37/lib/libnum_traits-b07ce563c7.rlib --extern gif=/nix/store/p46b73ly8mdg5qxxczdjdnczsjj12lb0-rust_gif-0.9.1/lib/libgif-0fd864a135.rlib --extern jpeg_decoder=/nix/store/2gc671ywk3s2mb2bhzc05k36yi3g9k0p-rust_jpeg-decoder-0.1.11/lib/libjpeg_decoder-212dd146f0.rlib --extern png=/nix/store/gn8m0zghrba6y9lj78ba6ibqmdhv62r1-rust_png-0.6.2/lib/libpng-0058f7788e.rlib --extern scoped_threadpool=/nix/store/answrzkb079mdv6jb66w9ymaxlczg1bs-rust_scoped_threadpool-0.1.7/lib/libscoped_threadpool-568946a60d.rlib --cap-lints allow --color always
error[E0463]: can't find crate for `semver` which `rustc_version` depends on
 --> build.rs:1:1
  |
1 | extern crate rustc_version;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate

error: aborting due to previous error

builder for ‘/nix/store/3bh21a184w8gxv0lilw2r5habm8l6ykp-rust_tempfile-2.1.5.drv’ failed with exit code 101
building path(s) ‘/nix/store/a15ppncc8yps4821sy0fa8mjrpdxp47p-rust_phf_shared-0.7.21’
building path(s) ‘/nix/store/ng4skndfanyzl42scpfd97s42n3z5699-rust_serde-0.9.15’
cannot build derivation ‘/nix/store/gwy54dv93q8jmpa3wdwlq4ids7i2q44b-rust_wc-lock-0.2.1.drv’: 1 dependencies couldn't be built
building path(s) ‘/nix/store/gf9062gm33a7sr01c4yn5sjj82ljj0m1-rust_winapi-0.2.8’
building path(s) ‘/nix/store/92x0wjzhh8ym4bws0lwivpln9zwnfxq3-rust_winapi-build-0.1.1’
building path(s) ‘/nix/store/580pbas7jdmgwd3d24rcyxz8wx5k0nmy-rust_xcb-0.8.1’
building path(s) ‘/nix/store/1kk88v0m24vlhd9r22dkzp1gvzljqk8w-rust_xml-rs-0.6.1’
building path(s) ‘/nix/store/6vz0x53ry1p5sayiq7qld2h9qwkp29jh-rust_xml-rs-0.7.0’
cannot build derivation ‘/nix/store/b2kxv29axvir7k75wclnjxcz2ifbrw8x-way-cooler-with-extensions-0.8.0.drv’: 1 dependencies couldn't be built
error: build of ‘/nix/store/b2kxv29axvir7k75wclnjxcz2ifbrw8x-way-cooler-with-extensions-0.8.0.drv’ failed
The invocation of "nix-build -A way-cooler /home/stewart/dev/fractalide/nixpkgs" failed