Memory Issue? Nix develop not able to work

When I try to run a flake in a development environment, “nix develop”, it is getting killed, or freezing the system.

There seems to be a memory problem.

HTOP shows the same application (/nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder) opening multiple pids, which looks odd.

“ps auxf” (pared down output)

marcus 1798 1.7 1.7 1076516 136260 ? Sl 11:03 0:09 | _ /nix/store/9f2z06ryjzwkiham3ki65sjfgrvczqim-gnome-software-44.4/bin/gnome-software --gapplication-service
marcus 1822 0.0 0.8 913948 64928 ? Sl 11:03 0:00 | _ /nix/store/s86rdmgv9qc251xbcxcmvd0pyx529bai-evolution-data-server-3.48.4/libexec/evolution-data-server/evolution-alarm-notify
marcus 1446 5.3 2.3 4286404 188528 ? Ssl 11:03 0:27 _ /nix/store/5kflbi966z0d1sazcy131qxws4m0avlk-gnome-shell-44.5/bin/gnome-shell
marcus 1720 0.6 1.0 663304 86808 ? Sl 11:03 0:03 | _ /nix/store/w26k4bicgqs94wgglv5v809a66y508cp-xwayland-23.2.2/bin/Xwayland :0 -rootless -noreset -accessx -core -auth /run/user/1000/.mutter-Xwaylandauth.M2DYD2 -listenfd 4 -listenfd 5 -displayfd 6 -listenfd 7 -byteswappedclients
marcus 2133 0.1 0.9 1024896 77696 ? Sl 11:03 0:00 | _ /nix/store/gkirzqvc79ncp1j1syvkmd6wz5yp48pk-mutter-44.5/libexec/mutter-x11-frames
marcus 2215 3.6 4.9 34237700 388268 ? Sl 11:03 0:18 | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2225 0.0 0.9 33901068 71968 ? S 11:03 0:00 | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=zygote --no-zygote-sandbox --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable
marcus 2249 2.4 2.3 34419932 185900 ? Sl 11:03 0:12 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=gpu-process --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable --gpu-preferences=WAAAAAAAAAAgAAAEAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --shared-files --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2226 0.0 0.9 33901056 71868 ? S 11:03 0:00 | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=zygote --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable
marcus 2228 0.0 0.2 33901084 18212 ? S 11:03 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=zygote --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable
marcus 2263 0.0 0.6 33943360 53680 ? Sl 11:03 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=utility --utility-sub-type=storage.mojom.StorageService --lang=fr --service-sandbox-type=utility --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2345 0.0 0.6 33942976 49968 ? Sl 11:03 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=utility --utility-sub-type=bat_ads.mojom.BatAdsService --lang=fr --service-sandbox-type=utility --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2350 0.0 1.3 1186889072 108972 ? Sl 11:03 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --extension-process --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=55674911 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2375 0.0 1.4 1186895724 110868 ? Sl 11:03 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --extension-process --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=6 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=55787284 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2435 0.3 1.7 1186889200 135500 ? Sl 11:03 0:01 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --extension-process --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=7 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=55912738 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2458 0.2 1.6 1186891120 133572 ? Sl 11:03 0:01 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --extension-process --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=55986476 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2495 0.7 2.2 1189029708 177512 ? Sl 11:04 0:03 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=24 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=78571725 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2526 0.3 1.8 1186959920 148252 ? Sl 11:04 0:01 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=26 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=83778326 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2571 1.7 2.5 1186906948 200332 ? Sl 11:05 0:07 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=28 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=121335840 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 5089 0.0 0.8 1186887524 69180 ? Sl 11:10 0:00 | | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=renderer --crashpad-handler-pid=2217 --enable-crash-reporter=, --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --change-stack-guard-on-fork=enable --brave_session_token=6963245360952810251 --lang=fr --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=29 --time-ticks-at-unix-epoch=-1698832980902994 --launch-time-ticks=474056800 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 2254 0.2 1.5 33936916 119376 ? Sl 11:03 0:01 | _ /nix/store/vhh1c4d17f9ji2kal5das7n499zwhqmm-brave-1.59.120/opt/brave.com/brave/brave --type=utility --utility-sub-type=network.mojom.NetworkService --lang=fr --service-sandbox-type=none --crashpad-handler-pid=2217 --enable-crash-reporter=, --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=0,i,8000201011719090712,856327981602977792,262144 --enable-features=VaapiVideoDecoder,VaapiVideoEncoder --disable-features=UseChromeOSDirectVideoDecoder
marcus 1527 0.0 0.6 606028 48648 ? Ssl 11:03 0:00 _ /nix/store/n910kq9hfgvdzl074jfk34k6g2r0vv83-evolution-with-plugins/libexec/evolution-source-registry
marcus 1554 0.0 0.3 637668 28564 ? S<sl 11:03 0:00 _ /nix/store/7c4dsyqwg1kf4d6mjp55sskja80a4m6a-wireplumber-0.4.15/bin/wireplumber
marcus 1655 0.0 0.5 670164 41092 ? Sl 11:03 0:00 _ /nix/store/v5ab47j5csg5ywy6s70zb7i9xnv9ckly-gnome-online-accounts-3.48.0/libexec/goa-daemon
marcus 1676 0.0 0.4 915704 34980 ? Ssl 11:03 0:00 _ /nix/store/n910kq9hfgvdzl074jfk34k6g2r0vv83-evolution-with-plugins/libexec/evolution-calendar-factory
marcus 1704 0.0 0.3 2683152 31056 ? Sl 11:03 0:00 _ /nix/store/glbk1cq5wpqa7ny73j4c8fypi7vd3gg6-gjs-1.76.2/bin/gjs /nix/store/5kflbi966z0d1sazcy131qxws4m0avlk-gnome-shell-44.5/share/gnome-shell/.org.gnome.Shell.Notifications-wrapped
marcus 1725 0.0 0.5 772636 40040 ? Ssl 11:03 0:00 _ /nix/store/n910kq9hfgvdzl074jfk34k6g2r0vv83-evolution-with-plugins/libexec/evolution-addressbook-factory
marcus 1736 0.0 0.3 416872 26216 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-color
marcus 1742 0.0 0.3 487884 24988 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-keyboard
marcus 1743 0.0 0.3 711084 29156 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-media-keys
marcus 1744 0.0 0.3 493120 27740 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-power
marcus 1760 0.0 0.3 488264 25180 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-wacom
marcus 1891 0.0 0.3 2748676 31444 ? Sl 11:03 0:00 _ /nix/store/glbk1cq5wpqa7ny73j4c8fypi7vd3gg6-gjs-1.76.2/bin/gjs /nix/store/5kflbi966z0d1sazcy131qxws4m0avlk-gnome-shell-44.5/share/gnome-shell/.org.gnome.ScreenSaver-wrapped
marcus 2024 0.0 0.2 416816 17868 ? Sl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-printer
marcus 2082 0.0 0.9 879064 75596 ? Ssl 11:03 0:00 _ /nix/store/7arljxv9l86nmcbzw86rxkrms9q7k5rq-gnome-settings-daemon-44.1/libexec/gsd-xsettings
marcus 2085 0.0 0.3 638904 28872 ? Ssl 11:03 0:00 _ /nix/store/51y86nlm02sd6n9kphqbrbrdaq5yls7x-xdg-desktop-portal-gnome-44.2/libexec/xdg-desktop-portal-gnome
marcus 2143 0.0 0.3 414344 25800 ? Ssl 11:03 0:00 _ /nix/store/bh9261igy71fyxx6k5s8hzsgvdf9wdbv-xdg-desktop-portal-gtk-1.14.1/libexec/xdg-desktop-portal-gtk
marcus 2590 7.6 1.8 1702292 148236 ? Sl 11:05 0:32 _ /nix/store/hsgf521wzsbl1fp4wij3dys9wz5arr7b-gnome-console-44.4/bin/kgx --gapplication-service