Thats pretty it. Its funny, for two reasons:
This note literally have 25.11 installed, because I made an nixos-rebuild switch –upgrade with the 25.11 channel so, it works… I just needed to reinstall because its simpler, i need to change the base filesystem… So it works on this note, despite the need of the installer of 3Gb of ram (that it have).
Second, it have EXACTLY 3Gb of ram, and the installer says it hasn’t (probably because of some graphics video reservation or something like that)…
There is something that i can do to install it via graphic installer, or should i go to the cli? i have no problem with that, i’m just lazy right now lol
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This most likely means your configuration is evaluating nixpkgs many times. Share your config; it should not need anywhere near that much memory.
I don’t think you can use a custom config with the graphical installer?
But 3 gigs seems awfully low to me, so this type of failure is not surprising to me - but a screenshot of the error if possible would be helpful.
No, i mean, the graphical installer on the 25.11 iso says that my computer doesn’t have the minimum 3g of ram, but it have exactly that amount. I know its low, but it is a really old laptop that i use for some tests… I just want to somehow bypass the message and install anyway…
If nothing works, i will get the cli and install by hand, but i prefer not to if possible.
Also, this is clearly a error on the installer (a not so importanto one, but a error nevertheless )
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Ikr this is not a solution you want but imho you should make your own config and install via cli. I’m talking from experience . I’ve never had a single succesful nixos calamares install specifically on older hardware. I did an install of 24.05 a year ago on socket 775 (core 2 quad cpu from 2008) with 4g ddr2 and I confirm setting everything up yourself including choosing proper graphic drivers, preferably going with x.org over wayland (‘cause it was to messed up) is the way to go. you shall also give your install like 6 gigs of swap space on a separate partition (assuming you ‘re on ssd). when it’s got 3 gigs of ram it could potentially lack uefi support 2 so you still need to manually set grub instead of systemd-boot. and one more thing: get cli iso of nix and install purely in command line, or else you’ll run out of memory - trust me, it happened several times. again that’s up to you 
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Thanks, i probably will do exactly this… it’s funny thou that the config that i put on this machine is just working and the installer says it wont… I understand, people making the installer have to be pretty conservative on those kind of things… but tanks anyway, i will go this way
by the way, this old system is running postgres over a zfs filesystem, and doing ok lol it’s VERY old, its a celeron, but its brave!
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same bro i’m running dovecot + postfix (mail), samba (file sharing) and lxc (containers) on atom 24/7 
hope it all works out
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Ah, yes, that’s a calamares thing. I imagine the error is more about expected desktop use; GNOME + a browser is probably too much for that kind of system.
Doing a manual install seems like a perfectly reasonable solution to me, though maybe calamares has a hidden setting somewhere to disable that check.
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Yes, that will do. The thing is that my system have 3Gb of ram, and the installer says it doesnt have at minimum 3g or ram lol its a funny/anoyng situation, but nothing that severe actually
Most likely this is just a silly edge case, something like the calamares setting is 3GB and you have 3GiB.
You could write an issue about this (make sure to include exactly how many bytes of memory you have, without using K/M/G - software rarely reports this reliably because nobody seems to understand SI units), it is a slightly unclean config. Can’t find where this is set at a glance.
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Hm, this makes sense… I will make an report as soon as possible.
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