=> diff <(nix derivation show /nix/store/l8k0pylnpwqygghg81xl0xd2gh6mwx51-hyprland-0.49.0.drv) <(nix derivation show /nix/store/wr5llaxf7b2hs9h4w57r1in3p27gip19-hyprland-0.49.0.drv)
2c2
<   "/nix/store/l8k0pylnpwqygghg81xl0xd2gh6mwx51-hyprland-0.49.0.drv": {
---
>   "/nix/store/wr5llaxf7b2hs9h4w57r1in3p27gip19-hyprland-0.49.0.drv": {
54a55,60
>       "/nix/store/07m7dxvrn127dxbkw1z560f9lqp0k1fy-systemd-257.6.drv": {
>         "dynamicOutputs": {},
>         "outputs": [
>           "dev"
>         ]
>       },
103c109
<       "/nix/store/8crp9ab8mh8n9px3jpybirplvyqmvyfi-aquamarine-0.8.0.drv": {
---
>       "/nix/store/88mr8yy390m73mml6j1yydssn4kgv2nw-xwayland-24.1.8.drv": {
106c112
<           "dev"
---
>           "out"
145,150d150
<       "/nix/store/dnlpqxhg50xmwxs85jqgzd29h4x8d2y9-systemd-257.6.drv": {
<         "dynamicOutputs": {},
<         "outputs": [
<           "dev"
<         ]
<       },
235c235
<       "/nix/store/qf8z2a2m2szv64q7fz1gc1cbaylzjx30-xcb-util-errors-1.0.1.drv": {
---
>       "/nix/store/nmkl6ljyvnfb778jdkahpjclzxdgm6fr-aquamarine-0.8.0.drv": {
241c241
<       "/nix/store/qvfgs67p2lg8xmy6lvj3wwx406ql5cjq-xwayland-24.1.8.drv": {
---
>       "/nix/store/qf8z2a2m2szv64q7fz1gc1cbaylzjx30-xcb-util-errors-1.0.1.drv": {
244c244
<           "out"
---
>           "dev"

idk who i was talking to, maybe emily or aleksana but i was complaining about nix always copying my dotfiles to the nix store. So what happened just now is i did .dump of my nix DB, then .read into a fresh DB and it had 3 effects afaict:

1. it shrunk from 599MB to 380MB ish
2. nix GC completed no problem and it felt substantially faster on average, it wasnt randomly getting stuck
3. nix no longer copies my dotfiles every time?

I get IOT instruction (core dumped) with nix-prefetch-url (Nix) 2.18.1 on Ubuntu, expected?

nix-prefetch-url 'https://selenium-release.storage.googleapis.com/3.141/selenium-server-standalone-3.141.59.jar'

(gdb) bt
#0  0x00007ffff7282ddc in __pthread_kill_implementation () from /nix/store/1zy01hjzwvvia6h9dq5xar88v77fgh9x-glibc-2.38-44/lib/libc.so.6
#1  0x00007ffff72339c6 in raise () from /nix/store/1zy01hjzwvvia6h9dq5xar88v77fgh9x-glibc-2.38-44/lib/libc.so.6
#2  0x00007ffff721c8fa in abort () from /nix/store/1zy01hjzwvvia6h9dq5xar88v77fgh9x-glibc-2.38-44/lib/libc.so.6
#3  0x00007ffff774e465 in nix::sourceToSink(std::function<void (nix::Source&)>)::SourceToSink::finish() [clone .cold] ()
   from /nix/store/m28r6mf37cc8bwwq52kqdzdkc9yrq3ag-nix-2.18.1/lib/libnixutil.so
#4  0x00007ffff79499b0 in nix::curlFileTransfer::workerThreadMain() ()
   from /nix/store/m28r6mf37cc8bwwq52kqdzdkc9yrq3ag-nix-2.18.1/lib/libnixstore.so
#5  0x00007ffff79508f0 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<nix::curlFileTransfer::curlFileTransfer()::{lambda()#1}> > >::_M_run() () from /nix/store/m28r6mf37cc8bwwq52kqdzdkc9yrq3ag-nix-2.18.1/lib/libnixstore.so
#6  0x00007ffff74e05c3 in execute_native_thread_routine ()
   from /nix/store/a3zlvnswi1p8cg7i9w4lpnvaankc7dxx-gcc-12.3.0-lib/lib/libstdc++.so.6
#7  0x00007ffff72810e4 in start_thread () from /nix/store/1zy01hjzwvvia6h9dq5xar88v77fgh9x-glibc-2.38-44/lib/libc.so.6
#8  0x00007ffff730375c in clone3 () from /nix/store/1zy01hjzwvvia6h9dq5xar88v77fgh9x-glibc-2.38-44/lib/libc.so.6