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add Nix support #23

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add Nix support
korewaChino Mar 18, 2026
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Merge branch 'main' into patch/nix-support
korewaChino Mar 22, 2026
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6 changes: 4 additions & 2 deletions base/Containerfile
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Expand Up @@ -110,9 +110,11 @@ RUN ln -srvf /var/opt /opt && \
ln -srvf /var/afs /afs && \
ln -srvf /var/media /media


# Add Nix support
RUN mkdir -p /var/nix && ln -srf /var/nix /nix && chmod 1777 /var/nix
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@tulilirockz tulilirockz Mar 22, 2026

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Won't work, nix requires the /nix directory to specifically not be a symlink. It must be writeable and probably a bind-mount to somewhere else

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@korewaChino korewaChino Mar 22, 2026

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huh... interesting. What if we bind mount it to /sysroot/nix

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@tulilirockz tulilirockz Mar 22, 2026

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I'd recommend not doing anything with /sysroot due to it being an internal implementation of bootc, the composefs-native backend wants to change that into a read-only mount as well

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@korewaChino korewaChino Mar 24, 2026

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what about an optional nix.mount unit that just creates a bind mount to /var/nix?

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@tulilirockz tulilirockz Mar 25, 2026

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That probably would work yeah! I think thats what the determinate-systems nix installer does that...?


# Tmpfiles configuration
RUN echo "$(for dir in opt usrlocal home srv mnt ; do echo "d /var/$dir 0755 root root -" ; done)" | tee -a /usr/lib/tmpfiles.d/bootc-base-dirs.conf && \
RUN echo "$(for dir in opt usrlocal home srv mnt nix ; do echo "d /var/$dir 0755 root root -" ; done)" | tee -a /usr/lib/tmpfiles.d/bootc-base-dirs.conf && \
echo "d /var/roothome 0700 root root -" | tee -a /usr/lib/tmpfiles.d/bootc-base-dirs.conf && \
echo "d /run/media 0755 root root -" | tee -a /usr/lib/tmpfiles.d/bootc-base-dirs.conf

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