> You do this for keep things in order or because it buys you functionality?
The former. Single shell expression generates many roots: .nix-gc-roots/dev-shell.drv -> /nix/store/ivznvsqn40vb6vkccy092ph1ryhlq12w-nixpkgs-patched .nix-gc-roots/dev-shell.drv-10 -> /nix/store/4zq1535pa85wkaxlxdrp751jhznlw8ki-stdenv .nix-gc-roots/dev-shell.drv-11 -> /nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh .nix-gc-roots/dev-shell.drv-2 -> /nix/store/9mcsmyj6b2f6k8527yxbbgpj7ahr3w2b-rlwrap-0.42 .nix-gc-roots/dev-shell.drv-2-doc -> /nix/store/9z2rfwf2pl07l5qf3p2d7b4hqw9gs5h4-bash-4.3-p46-doc .nix-gc-roots/dev-shell.drv-2-info -> /nix/store/vd4pq9lxpihd2m86k6hckq30ky5gj2xb-bash-4.3-p46-info .nix-gc-roots/dev-shell.drv-3 -> /nix/store/nyj6xd7s1n1w8c0xdwk5ddhi7bjcyi9x-bash-4.3-p46 .nix-gc-roots/dev-shell.drv-3-doc -> /nix/store/9z2rfwf2pl07l5qf3p2d7b4hqw9gs5h4-bash-4.3-p46-doc .nix-gc-roots/dev-shell.drv-3-info -> /nix/store/vd4pq9lxpihd2m86k6hckq30ky5gj2xb-bash-4.3-p46-info .nix-gc-roots/dev-shell.drv-4 -> /nix/store/p9sfacfhf35f41nqkw6pa1i8hamn5dha-sshpass-1.05 .nix-gc-roots/dev-shell.drv-5 -> /nix/store/4kmvzlc587bmx6lbfqy171pim5za36az-sqlite-3.14.1 .nix-gc-roots/dev-shell.drv-5-bin -> /nix/store/b38jh5lwv42985vymzx3ayj4irz638r0-sqlite-3.14.1-bin .nix-gc-roots/dev-shell.drv-5-dev -> /nix/store/kiixbwijnfgb3y46l3avc0rhwl9iqida-sqlite-3.14.1-dev .nix-gc-roots/dev-shell.drv-6 -> /nix/store/nzzdhli6j2m7bbyj1a1cq2g99mz2cwvs-jq-1.5 .nix-gc-roots/dev-shell.drv-6-bin -> /nix/store/b38jh5lwv42985vymzx3ayj4irz638r0-sqlite-3.14.1-bin .nix-gc-roots/dev-shell.drv-6-dev -> /nix/store/kiixbwijnfgb3y46l3avc0rhwl9iqida-sqlite-3.14.1-dev .nix-gc-roots/dev-shell.drv-7 -> /nix/store/577a01ii2g1z9qflgc8w8d85ajyfvwvp-nixops-tarball-1.5pre0_abcdef .nix-gc-roots/dev-shell.drv-8 -> /nix/store/akbbv847pfxbi31knwypvwi7nfwcbp9m-nixops-1.5pre0_abcdef .nix-gc-roots/dev-shell.drv-9 -> /nix/store/w67jiazdf4xyrgs5s0rj5rdxrf92zxil-nss-cacert-3.26 btw, now I see there are duplicate entities, so I guess it is useful to clean roots before nix-shell run. > This is basically my experience. The method on the old wiki makes the > environment survive `nix-channel --update` but not `nix-collect-garbage` > which is weird because (as in the wiki) I explicitly asked for the .drv > be a '--indirect --add-root' on $PWD. I hope there is a way to pin src as GC root, but dumb `buildInputs = [ nixpkgsSrc ];` doesn't work. 2016-10-01 15:49 GMT+00:00 Ruben Astudillo <ruben.as...@gmail.com>: > On 01/10/16 04:03, Daniel Hlynskyi wrote: > > To complete previous answer. > > > > I create a separate directory .nix-gc-roots, because nix-shell produces > > many roots. > > You do this for keep things in order or because it buys you functionality? > > > Also, I haven't found yet a way to get nix root for nixpkgs imported as > > external derivation, so after garbage collect I still have to > > redownload some sources > > This is basically my experience. The method on the old wiki makes the > environment survive `nix-channel --update` but not `nix-collect-garbage` > which is weird because (as in the wiki) I explicitly asked for the .drv > be a '--indirect --add-root' on $PWD. >
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