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a way to develop software with Nix

Nix 61.03% Haskell 0.82% Shell 9.57% Emacs Lisp 27.47% Dockerfile 0.28% Python 0.83%

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error: attribute ‘bsd3’ missing

On Ubuntu 16.04.2 amd64

I can do build successfully with nix-build but nix-shell throws this error:

$ nix-shell --show-trace
error: while evaluating the attribute ‘env.haskell’ at /home/.../example-nix/modules/pkgs-make/default.nix:54:25:
while evaluating the attribute ‘env’ at /home/.../example-nix/modules/pkgs-make/haskell.nix:133:12:
while evaluating ‘makeOverridable’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/lib/customisation.nix:54:24, called from /home/.../example-nix/modules/pkgs-make/haskell.nix:112:10:
while evaluating anonymous function at /home/.../example-nix/modules/pkgs-make/haskell.nix:39:14, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/lib/customisation.nix:56:12:
while evaluating ‘makeOverridable’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/lib/customisation.nix:54:24, called from /home/.../example-nix/modules/pkgs-make/haskell.nix:39:20:
while evaluating anonymous function at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/development/haskell-modules/generic-builder.nix:5:1, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/lib/customisation.nix:56:12:
while evaluating ‘mkDerivation’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:111:5, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/development/haskell-modules/generic-builder.nix:170:1:
while evaluating ‘checkValidity’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:211:23, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:238:22:
while evaluating ‘hasDeniedUnfreeLicense’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:72:28, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:212:12:
while evaluating ‘isUnfree’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:57:14, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:75:5:
while evaluating ‘toList’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/lib/lists.nix:198:12, called from /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/stdenv/generic/default.nix:75:15:
while evaluating the attribute ‘meta.license’ at /nix/store/977dc6s2lxnysa3gbvnjm1s4sk7i5gah-nixpkgs-fa03b8279fa9b544c29c97eaa5263163b6716046-src/pkgs/development/haskell-modules/generic-builder.nix:327:19:
while evaluating the attribute ‘nix.licenses.bsd3’ at /home/.../example-nix/modules/pkgs-make/lib/default.nix:10:9:
attribute ‘bsd3’ missing, at /home/.../example-nix/modules/pkgs-make/haskell.nix:116:23

"Gabriel Gonzalez's nix-haskell" link is broken

feedback

This is an awesome guide. Nix is always in need of some extra documentation :)

Feedback:

For nix-shell you could have alternatively used "nix-shell -p hello" which is just a little less boiler-plate than doing an import expression on nixpkgs.

This is a little shell.nix that I use as a template for most projects. It's a little nicer than creating an overlay over all of nixpkgs, and should evaluate much faster. 'ghcWithPackages' also plays nicely with hoogle and similar tools.
https://pastebin.com/JPqQuLRr

Random thoughts

might mention nixops, and perhaps explicitly call out the nix ecosystem in passing here: https://github.com/shajra/example-nix/tree/master/tutorials/0-nix-intro

in general I really liked this section, though another thing could add is some gotchas with paths (./ -> ./. to get current directory)

https://youtu.be/dlRuMdm6pRU?t=365 this talk is also sort of a nice low level complement to gabriel gonzalez more high level overview of nix tradeoffs

I also use spacemacs with direnv, this might be too tangential to put in the repo, but I've found spacemacs dev cycle has slowed a bit and the "develop/master branch" is actually more stable than the stable branch (e.g. treemacs is like neotree but doesnt go haywire when using spacemacs layout system, js layer is more up to date, etc.).

Tutorial

bin/licenses script terminal colorizing not general enough

I thought the "--color-output" of jq looked nice. I could remove it. But I guess it feels like a silly challenge to learn more how colorizing works.

I may just break down and remove "--colorize-output" switch.

This was originally brought up in #4, so there's some comments there.

Typo in readme for 0-nix-intro/

"by default built from of NIX_PATH" in the "Calling nix" section.

Very nice resource. Keep up the good work! 🙂

nix-build fails

building path(s) ‘/nix/store/3gi65cgl8bi20i563ki6a4b0ifai7x2w-example-app-cabal2nix’
dyld: Library not loaded: /usr/lib/system/libsystem_coretls.dylib
  Referenced from: /nix/store/n9lvzry997gqab2lqlqzvzjfi1k4icj1-Libsystem-osx-10.11.6/lib/libSystem.B.dylib
  Reason: image not found
builder for ‘/nix/store/c0zrp51bh777asgnx4wh68blvsgb1p4g-example-app-cabal2nix.drv’ failed due to signal 6 (Abort trap: 6)
error: build of ‘/nix/store/c0zrp51bh777asgnx4wh68blvsgb1p4g-example-app-cabal2nix.drv’ failed
(use ‘--show-trace’ to show detailed location information)

direnv.nix for direct envrc specification

Might be nice to first check for direnv.nix, and if it exists just do a normal instantiate + realize (i.e. no IN_NIX_SHELL or anything) and take its $out as an envrc file directly.

styx

You may be interested in this tool I've made: https://github.com/jyp/styx
If you have feedback on it I'd love to hear it!

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