Revert "try store mounted read-only"

This reverts commit 586be6f309.

.woodpecker/cd.yaml

@@ -14,14 +14,12 @@ steps:
         echo "$CD_SSH_KEY" > ~/.ssh/id_ed25519
         ls -l ~/.ssh/id_ed25519
         chmod 600 ~/.ssh/id_ed25519
-      - nix-shell --eval-store local --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt -p strace --run 'strace -f -o ssh-agent.log ssh-agent -s'
+      - nix-shell -p strace --run 'strace -f -o ssh-agent.log ssh-agent -s'
       - cat ssh-agent.log
       - |
         eval "$(ssh-agent -s)"
         ssh-add ~/.ssh/id_ed25519
-      - nix-shell --eval-store local --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt --run 'eval "$(ssh-agent -s)" && ssh-add ~/.ssh/id_ed25519 && ssh-agent -s && SHELL=$(which bash) nixops4 apply -v default'
+      - nix-shell --run 'eval "$(ssh-agent -s)" && ssh-add ~/.ssh/id_ed25519 && ssh-agent -s && SHELL=$(which bash) nixops4 apply -v default'
     environment:
       CD_SSH_KEY:
         from_secret: cd_ssh_key
-    volumes:
-      - /nix:/mnt/nix:ro

.woodpecker/check-deployment-basic.yaml

@@ -10,6 +10,4 @@ steps:
   - name: check-deployment-basic
     image: nixos/nix
     commands:
-      - nix build --eval-store local --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt --extra-experimental-features 'nix-command flakes' .#checks.x86_64-linux.deployment-basic -L
-    volumes:
-      - /nix:/mnt/nix:ro
+      - nix build --extra-experimental-features 'nix-command flakes' .#checks.x86_64-linux.deployment-basic -L