installation-cd-base.nix: Use boot.kernel.sysctl
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@ -42,26 +42,24 @@ in
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isoImage.volumeID = "NIXOS_${config.system.nixosVersion}";
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boot.postBootCommands =
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# Provide the NixOS/Nixpkgs sources in /etc/nixos. This is required
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# for nixos-install.
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boot.postBootCommands = optionalString includeSources
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''
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# Provide the NixOS/Nixpkgs sources in /etc/nixos. This is required
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# for nixos-install.
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${optionalString includeSources ''
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echo "unpacking the NixOS/Nixpkgs sources..."
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mkdir -p /nix/var/nix/profiles/per-user/root
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${config.environment.nix}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels -i ${channelSources} --quiet
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mkdir -m 0700 -p /root/.nix-defexpr
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ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels
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''}
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# Make the installer more likely to succeed in low memory
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# environments. The kernel's overcommit heustistics bite us
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# fairly often, preventing processes such as nix-worker or
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# download-using-manifests.pl from forking even if there is
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# plenty of free memory.
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echo 1 > /proc/sys/vm/overcommit_memory
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echo "unpacking the NixOS/Nixpkgs sources..."
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mkdir -p /nix/var/nix/profiles/per-user/root
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${config.environment.nix}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels -i ${channelSources} --quiet
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mkdir -m 0700 -p /root/.nix-defexpr
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ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels
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'';
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# Make the installer more likely to succeed in low memory
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# environments. The kernel's overcommit heustistics bite us
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# fairly often, preventing processes such as nix-worker or
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# download-using-manifests.pl from forking even if there is
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# plenty of free memory.
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boot.kernel.sysctl."vm.overcommit_memory" = "1";
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# To speed up installation a little bit, include the complete stdenv
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# in the Nix store on the CD.
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isoImage.storeContents = [ pkgs.stdenv pkgs.busybox ];
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