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danieldk
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Oct 3, 2025
dockerfiles/Dockerfile
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| && echo "max-jobs = $MAX_JOBS" >> /etc/nix/nix.conf \ | ||
| && echo "cores = $CORES" >> /etc/nix/nix.conf \ | ||
| && nix profile install nixpkgs#cachix nixpkgs#git-lfs nixpkgs#jq \ | ||
| && nix profile install --impure nixpkgs#cachix nixpkgs#git-lfs nixpkgs#jq \ |
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not 100% sure, however after bumping the nix version attempts to build the docker image would throw
=> ERROR [2/5] RUN echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf && echo "max-jobs = 4" >> 0.3s
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> [2/5] RUN echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf && echo "max-jobs = 4" >> /etc/nix/nix.conf && echo "cores = 4" >> /etc/nix/nix.conf && nix profile install nixpkgs#cachix nixpkgs#git-lfs nixpkgs#jq && cachix use huggingface:
0.265 error: access to absolute path '/nix/store/s5yzzaspkgxmhhf9dvc7yj459czh3zn2-user-environment' is forbidden in pure evaluation mode (use '--impure' to override)
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Dockerfile:8
--------------------
7 | # Combine RUN commands to reduce layers and improve caching
8 | >>> RUN echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf \
9 | >>> && echo "max-jobs = $MAX_JOBS" >> /etc/nix/nix.conf \
10 | >>> && echo "cores = $CORES" >> /etc/nix/nix.conf \
11 | >>> && nix profile install nixpkgs#cachix nixpkgs#git-lfs nixpkgs#jq \
12 | >>> && cachix use huggingface
13 | # Copy external files
--------------------
ERROR: failed to solve: process "/bin/sh -c echo \"experimental-features = nix-command flakes\" >> /etc/nix/nix.conf && echo \"max-jobs = $MAX_JOBS\" >> /etc/nix/nix.conf && echo \"cores = $CORES\" >> /etc/nix/nix.conf && nix profile install nixpkgs#cachix nixpkgs#git-lfs nixpkgs#jq && cachix use huggingface" did not complete successfully: exit code: 1
which seem to suggest that the more recent version of nix dis allow accessing the user env without impure..
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Apparently it's fixed in 2.25.3: https://discourse.nixos.org/t/nix-profile-install-errors-wants-impure/39793/4
It looks looks like my machine is using 2.30.3 without issues, maybe we should update to
FROM nixos/nix:2.30.3
?
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This PR bumps the Docker images from nix 2.18 to 2.23, fixes the override logic when flake.nix points to a local path, and updates the README with a simpler Docker command that works more reliably than the old one.