chore(gitlab-ci): ...

.gitlab-ci.yml

@@ -16,7 +16,8 @@ node dependencies:
   script:
     - nix build -o node-dependencies .#uniworxNodeDependencies
   before_script:
-    - nix-env -f '<nixpkgs>' -iA envsubst nixUnstable git
+    - install -m 0644 .gitlab-ci/nix-bootstrap.conf /etc/nix/nix.conf
+    - nix-env -f '<nixpkgs>' -iA envsubst nixUnstable git coreutils
     - envsubst -i .gitlab-ci/nix.conf -o /etc/nix/nix.conf
     - git config --global init.defaultBranch master
     - install -v -m 0700 -d ~/.ssh

.gitlab-ci/nix-bootstrap.conf

@@ -0,0 +1,5 @@
+sandbox = true
+experimental-features = nix-command flakes ca-references
+substituters = https://hydra.iohk.io https://cache.nixos.org/
+trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
+require-sigs = true