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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/qjzfwfcr4z2g3dznlfh77scwv5q7zm24-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 ‘mdk-sdk-0.32.0’ in /nix/store/qjzfwfcr4z2g3dznlfh77scwv5q7zm24-source/pkgs/by-name/md/mdk-sdk/package.nix:83 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) [ "mdk-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 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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/nlr5k3gm62l9i3yvj663jb30m24x81cy-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 ‘gobject-introspection-1.80.1’ in /nix/store/nlr5k3gm62l9i3yvj663jb30m24x81cy-source/pkgs/development/libraries/gobject-introspection/default.nix:181 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. 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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/w7ikwi6ld7f31065895ds3qjl2k68j0i-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 ‘gnutls-3.8.9’ in /nix/store/w7ikwi6ld7f31065895ds3qjl2k68j0i-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. 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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/avnsiiqfrcg0ivbcja65627hsjry5clk-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 ‘gnutls-3.8.9’ in /nix/store/avnsiiqfrcg0ivbcja65627hsjry5clk-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/xjqj6wy7yfahfm254v2cy0dp88sx5fkm-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 ‘gnutls-3.8.9’ in /nix/store/xjqj6wy7yfahfm254v2cy0dp88sx5fkm-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/aj8pizjgipvb0swa6sdpaj0vbcaiwmrb-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 ‘gnutls-3.8.9’ in /nix/store/aj8pizjgipvb0swa6sdpaj0vbcaiwmrb-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/53skx87id54wy850qvnd7l3bnjdw7dnw-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 ‘gnutls-3.8.9’ in /nix/store/53skx87id54wy850qvnd7l3bnjdw7dnw-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/hsllhc5ddrbhvy4k5dj9viabvvxjc9ys-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 ‘gnutls-3.8.9’ in /nix/store/hsllhc5ddrbhvy4k5dj9viabvvxjc9ys-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/nvhh06ip60mzjamcp2pr40kfaqpf4v74-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 ‘gobject-introspection-1.80.1’ in /nix/store/nvhh06ip60mzjamcp2pr40kfaqpf4v74-source/pkgs/development/libraries/gobject-introspection/default.nix:181 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. 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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/rszxh7b5yrwc7r72bsd4rp38yy6j8pz5-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 ‘gtk+3-3.24.49’ in /nix/store/rszxh7b5yrwc7r72bsd4rp38yy6j8pz5-source/pkgs/development/libraries/gtk/3.x.nix:261 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/2pic4154i3irdjhxlzlynpp9fa5nd9p6-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 ‘mbedtls-2.28.10’ in /nix/store/2pic4154i3irdjhxlzlynpp9fa5nd9p6-source/pkgs/development/libraries/mbedtls/generic.nix:68 is marked as insecure, refusing to evaluate. Known issues: - Mbed TLS 2 is not maintained anymore. Please migrate to newer versions You can install it anyway by allowing this package, using the following methods: a) To temporarily allow all insecure packages, you can use an environment variable for a single invocation of the nix tools: $ export NIXPKGS_ALLOW_INSECURE=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 add ‘mbedtls-2.28.10’ to `nixpkgs.config.permittedInsecurePackages` in the configuration.nix, like so: { nixpkgs.config.permittedInsecurePackages = [ "mbedtls-2.28.10" ]; } c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add ‘mbedtls-2.28.10’ to `permittedInsecurePackages` in ~/.config/nixpkgs/config.nix, like so: { permittedInsecurePackages = [ "mbedtls-2.28.10" ]; } GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/rpj08bpwgvd4p91r76gl1bp1m6sxz6h4-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 ‘mbedtls-2.28.10’ in /nix/store/rpj08bpwgvd4p91r76gl1bp1m6sxz6h4-source/pkgs/development/libraries/mbedtls/generic.nix:68 is marked as insecure, refusing to evaluate. Known issues: - Mbed TLS 2 is not maintained anymore. Please migrate to newer versions You can install it anyway by allowing this package, using the following methods: a) To temporarily allow all insecure packages, you can use an environment variable for a single invocation of the nix tools: $ export NIXPKGS_ALLOW_INSECURE=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 add ‘mbedtls-2.28.10’ to `nixpkgs.config.permittedInsecurePackages` in the configuration.nix, like so: { nixpkgs.config.permittedInsecurePackages = [ "mbedtls-2.28.10" ]; } c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add ‘mbedtls-2.28.10’ to `permittedInsecurePackages` in ~/.config/nixpkgs/config.nix, like so: { permittedInsecurePackages = [ "mbedtls-2.28.10" ]; } GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/fdryj1xf484hmvrnjalc93qd83b69nfv-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 ‘gtk+3-3.24.49’ in /nix/store/fdryj1xf484hmvrnjalc93qd83b69nfv-source/pkgs/development/libraries/gtk/3.x.nix:261 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/g8dfaprpbd393d6p7gfvs877jz84l38f-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 ‘gnutls-3.8.9’ in /nix/store/g8dfaprpbd393d6p7gfvs877jz84l38f-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/hmfaf816nhnl7mr76lh772p5q0kpd6xz-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 ‘gtk+3-3.24.49’ in /nix/store/hmfaf816nhnl7mr76lh772p5q0kpd6xz-source/pkgs/development/libraries/gtk/3.x.nix:261 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. 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/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/jv3gm34q2i1qrpq2b5j42swr9hlf9b4l-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 ‘gtk+3-3.24.49’ in /nix/store/jv3gm34q2i1qrpq2b5j42swr9hlf9b4l-source/pkgs/development/libraries/gtk/3.x.nix:261 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix. GC Warning: Failed to expand heap by 4194304 KiB error: … while evaluating attribute 'drv' at /nix/store/01va76hp6j011dz90bk8jrm120kaq9yq-filnix-experiment-0.7.0/lib/experiment/planner.nix:14:3: 13| { 14| drv = p.drvPath; | ^ 15| name = p.name; … while evaluating the attribute 'drvPath' at /nix/store/9nx6jjm7kg7gs5wim11z5fhr09waq76b-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 ‘gnutls-3.8.9’ in /nix/store/9nx6jjm7kg7gs5wim11z5fhr09waq76b-source/pkgs/development/libraries/gnutls/default.nix:250 is marked as broken, refusing to evaluate. a) To temporarily allow broken packages, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_BROKEN=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.allowBroken = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowBroken = true; } to ~/.config/nixpkgs/config.nix.