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https://github.com/zephrynis/nix-flake.git
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Zephrynis
d14196dcde
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01C5ydBQk68JYw8HXzUDLAyV
89 lines
4.8 KiB
Markdown
89 lines
4.8 KiB
Markdown
# nixos-pc
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NixOS flake for the desktop PC: Hyprland with [end-4's illogical-impulse](https://github.com/end-4/dots-hyprland) via [soymou/illogical-flake](https://github.com/soymou/illogical-flake), NVIDIA RTX 3080, Steam/gaming, dev tools.
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- Host: `nixos-pc` · User: `zephrynis` · Channel: nixos-unstable
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- Boot: systemd-boot on this install's **own ESP** on the 1TB WD SSD; **rEFInd** (on the 2TB NVMe's ESP) remains the top-level OS picker and auto-detects it.
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```
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hosts/nixos-pc/ host wiring, bootloader, user, hardware config
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modules/ core, desktop (hyprland/sddm/fonts), nvidia, gaming
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home/zephrynis.nix illogical-impulse + git/direnv/vscode/CLI tools
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```
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Rebuild after changes: `sudo nixos-rebuild switch --flake .#nixos-pc`
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Update inputs (one at a time is safer): `nix flake update <input>`
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---
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## Install procedure
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Target: ~250GB shrunk from the work-Windows partition on the **1TB WD SA500 SATA SSD**. The work Windows on that disk and everything on the 2TB NVMe (other Windows, Arch, rEFInd's ESP) must not be touched.
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### 1. Prep (from the work Windows)
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1. Back up anything important. If BitLocker is enabled on C:, **export the recovery key** and suspend BitLocker before repartitioning.
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2. Disable Fast Startup: `powercfg /h off` (admin) — otherwise NTFS is left dirty.
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3. Shrink C: by ~256000 MB: Disk Management → right-click C: → Shrink Volume. If it won't shrink enough (unmovable files): temporarily disable pagefile + System Restore on C:, reboot, retry, re-enable after.
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4. Push this repo somewhere reachable from the ISO (GitHub) or copy to a USB stick. **Flakes only evaluate git-tracked files** — commit everything.
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5. BIOS: disable Secure Boot (stock NixOS bootloader is unsigned). F11 = one-time boot menu.
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### 2. Partition & install (NixOS ISO, UEFI mode)
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```sh
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ls /sys/firmware/efi # must exist (UEFI mode)
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lsblk -o NAME,SIZE,FSTYPE,LABEL,MODEL # identify disks
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```
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The 1TB WD (WDS100T1R0A) is likely `/dev/sda`. **Do not touch any NTFS partition, and nothing on the NVMe.** In the ~250G free space (parted `unit GiB`, `print free` to see exact bounds):
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```sh
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parted /dev/sda -- mkpart ESP fat32 <freeStart> <freeStart+1GiB>
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parted /dev/sda -- set <N> esp on
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parted /dev/sda -- mkpart root ext4 <freeStart+1GiB> 100%
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mkfs.fat -F 32 -n NIXBOOT /dev/sdaX # the new 1GiB partition
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mkfs.ext4 -L nixos /dev/sdaY # the new large partition
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mount /dev/disk/by-label/nixos /mnt
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mkdir -p /mnt/boot
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mount -o umask=0077 /dev/disk/by-label/NIXBOOT /mnt/boot
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```
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Get the flake and the real hardware config:
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```sh
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git clone <this-repo-url> /mnt/etc/nixos # or copy from USB
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nixos-generate-config --root /mnt
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mv /mnt/etc/nixos/hardware-configuration.nix /mnt/etc/nixos/hosts/nixos-pc/hardware-configuration.nix
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rm /mnt/etc/nixos/configuration.nix
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git -C /mnt/etc/nixos add -A
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```
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Install (needs network — ethernet just works, else `nmtui`):
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```sh
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nixos-install --flake /mnt/etc/nixos#nixos-pc # sets root password at the end
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nixos-enter --root /mnt -c 'passwd zephrynis'
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reboot
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```
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### 3. After first boot
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1. rEFInd should show a new NixOS/systemd-boot entry (it scans all ESPs). Windows and Arch entries must still work.
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2. If the firmware now boots straight into systemd-boot instead of rEFInd, fix the order from NixOS: `efibootmgr` to list, `sudo efibootmgr -o XXXX,YYYY,...` with rEFInd first.
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3. Optional rEFInd polish (edit `refind.conf` on the NVMe ESP): a `menuentry` stanza for a custom NixOS name/icon, and `dont_scan_files`/`dont_scan_dirs` to hide duplicate auto-detected kernel entries from the NIXBOOT ESP.
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4. Checks: `nvidia-smi`; `cat /sys/module/nvidia_drm/parameters/modeset` → `Y`; Hyprland session in SDDM; quickshell bar appears (Super for launcher); Steam runs a Proton title.
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- If the `qs` (quickshell) binary is missing, add `inputs.illogical-flake.inputs.quickshell.packages.x86_64-linux.default` to `home.packages` and rebuild.
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- Cursor invisible/glitchy: enable Hyprland `cursor:no_hardware_cursors = true`, or the commented `WLR_NO_HARDWARE_CURSORS` fallback in `modules/nvidia.nix`.
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### Follow-up (someday): separate rEFInd entries for the two Windows installs
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Both Windows currently share one Windows Boot Manager/BCD on the NVMe ESP, so rEFInd shows a single Windows entry with a second picker behind it. The new ESP on the 1TB SSD makes splitting easy:
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1. From the **work Windows**, assign the NIXBOOT ESP a letter (e.g. `S:` via `diskpart` → `assign`), then:
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`bcdboot C:\Windows /s S: /f UEFI`
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This creates an independent Windows Boot Manager + BCD on the 1TB SSD's ESP that boots only the work OS. 1GiB is plenty for both this and NixOS's kernels.
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2. rEFInd then shows two distinct Windows Boot Manager entries (one per ESP).
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3. Remove the work OS's entry from the old shared BCD (`msconfig` → Boot tab, or `bcdedit /delete <id>`) so each menu boots exactly one Windows.
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