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| 12 Aug 2025 |
 c4lliope | hi, I could really use help on a nix machine where I have many old packages in the store - mainly multiple copies of libreoffice and cef, which I haven't used in months. I run nix-collect-garbage a bunch and I finally ran dust on the root to see where the problem is:
1.3G │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ┌─┴ 24k8smf6i1fiq7x5zp1qkqhm4zy5kidh-libreoffice-7.6.7.2 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ 8c43345jxrqkn74h3cqaiiakx5p2031w-libreoffice-7.6.7.2 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ yxz4jmv9yn4qvmxg9za0jjymcpj3ngab-libreoffice-7.6.7.2 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ lasyr763kngl0njvcvzxcz1lylxkic4j-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ rm4lpai2xd1d35lbsvx3drvsp0g95n5j-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ dzsff307h34si4d6fxxnzrwj9rzbycjh-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ ic7wgx3fk2hsv111scp03pgfv6d8fm8r-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ gfvf13zm42ihkg772bphpydgk2slwqb1-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.2G │ │ ┌── lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ ├─┴ gba4zl0igykjxfdrrk2klffbmblswkvj-cef-binary-121.3.13 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ ├─┴ ap25q0f690fpmhgg957w0pwcb6k0m278-libreoffice-24.2.7.2│█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ ├─┴ yhmw5ffiz531z04sachzbhysjljcscya-libreoffice-24.2.7.2│█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ ├─┴ xlfxk2fpiz174g6a0iqcfkxi0yc8s0zn-libreoffice-24.2.7.2│█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌── libcef.so │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.3G │ │ ┌─┴ Release │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ ├─┴ aq25mfhik3jbq8l0vf8l812jig5ym1r6-cef-binary-127.3.5 │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌── libreoffice │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ │ ┌─┴ lib │█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
1.4G │ ├─┴ kfln3cfd26rgszjycrzs3nddxdlins3z-libreoffice-24.8.7.2│█▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │ 1%
181G │ ┌─┴ store │██████████████████████ │ 84%
181G ├─┴ nix │██████████████████████ │ 84%
215G ┌─┴ / │██████████████████████████ │ 100%
Is there any reason these would not be cleaned up by garbage collection? I really need to rebuild this machine because my store partition is far too small to handle this. Hope there is a reason or method to learn about the cache invalidation rules here.
| 00:57:09 |
| c4lliope | *I'm sure libreoffice is unused, unsure if something depends on cef. | 00:58:51 |
 hexa | active system closures that reference it | 00:58:52 |
| hexa | set configurationLimit for your bootloader | 00:59:00 |
| c4lliope | uh. | 00:59:13 |
| hexa | the default is 100 | 00:59:20 |
| c4lliope | I need a method of exploring the closures to see why | 00:59:22 |
| hexa | nix why-depends | 00:59:47 |
| hexa | or nix-tree | 01:00:12 |
| c4lliope | Yeah! And I get the idea behind the configLimit but with nix-collect-garbage --old, there is only one configuration at all. | 01:00:27 |
| hexa | ok, so your system closures are generally anchored by gcroots | 01:01:07 |
| hexa | they are in /nix/var/nix/gcroots | 01:01:18 |
| hexa | well, not only your system closures | 01:01:32 |
| hexa | also result-symlinks that are still floating around | 01:01:53 |
| c4lliope | oh dang there are so many gcroots. so damn many | 01:03:03 |
| c4lliope | I'm on generation 1000+ so I should have learned this ages ago, thank you!
I can already see the difference, should plug in before the fan takes off. | 01:06:57 |
| hexa | haha, enjoy | 01:08:15 |
| hexa | 2005 here 😄 | 01:08:38 |
| c4lliope | eh, configurationLimit=8 helped some but not too much. still a few libreoffices hanging around. I'll run through nix-tree, thanks for the quick help! | 01:12:05 |
