GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/64fw1c0wc25rqrs9gf975pj6p8fvfyjb-filnix-experiment-0.12.4/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/xzdynjl6kd8yvl0hc4cp52ngcnk9p86j-source/lib/customisation.nix:418:7: 417| // { 418| drvPath = | ^ 419| assert condition; (stack trace truncated; use '--show-trace' to show the full, detailed trace) error: Package ‘vst2-sdk-2018-06-11’ in /nix/store/xzdynjl6kd8yvl0hc4cp52ngcnk9p86j-source/pkgs/by-name/vs/vst2-sdk/package.nix:19 has an unfree license (‘unfree’), refusing to evaluate. a) To temporarily allow unfree packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_UNFREE=1 Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake, then pass `--impure` in order to allow use of environment variables. b) For `nixos-rebuild` you can set { nixpkgs.config.allowUnfree = true; } in configuration.nix to override this. Alternatively you can configure a predicate to allow specific packages: { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "vst2-sdk" ]; } c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowUnfree = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/64fw1c0wc25rqrs9gf975pj6p8fvfyjb-filnix-experiment-0.12.4/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/gvj0x9nk23x9i8w8j86bqlbpkcj3lcg6-source/lib/customisation.nix:418:7: 417| // { 418| drvPath = | ^ 419| assert condition; (stack trace truncated; use '--show-trace' to show the full, detailed trace) error: attribute 'devdoc' missing at /nix/store/gvj0x9nk23x9i8w8j86bqlbpkcj3lcg6-source/pkgs/by-name/bi/biblioteca/package.nix:67:7: 66| webkitgtk.devdoc 67| gobject-introspection.devdoc | ^ 68| ] GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB GC Warning: Failed to expand heap by 4194304 KiB