add volume mount for nix

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

.github/workflows/flake-health-checks.yml

@@ -8,10 +8,11 @@ on:
 jobs:
     health-check:
         name: "Perform Nix flake checks"
-        runs-on: ${{ matrix.os }}
+        runs-on: ubuntu-latest
-        strategy:
+        container:
-            matrix:
+            image: ubuntu:latest
-                os: [ubuntu-latest]
+            volumes:
+                - "/nix:/nix"
         steps:
             - uses: DeterminateSystems/nix-installer-action@main
             - name: Setup Attic cache
@@ -26,10 +27,11 @@ jobs:
             - run: nix ./utils/attic-push.bash
     build-checks:
         name: "Build nix outputs"
-        runs-on: ${{ matrix.os }}
+        runs-on: ubuntu-latest
-        strategy:
+        container:
-            matrix:
+            image: ubuntu:latest
-                os: [ubuntu-latest]
+            volumes:
+                - "/nix:/nix"
         steps:
             - uses: DeterminateSystems/nix-installer-action@main
             - name: Setup Attic cache

systems/palatine-hill/docker/act-runner.nix

@@ -6,6 +6,7 @@
 let
   vars = import ../vars.nix;
   act_path = vars.primary_act;
+  act_config_path = ./act_config.yaml;
 in
 {
   virtualisation.oci-containers.containers = {
@@ -20,7 +21,7 @@ in
       };
       ports = [ "8088:8088" ];
       volumes = [
-        "${act_path}/stable-latest-main/config.yaml:/config.yaml"
+        "${act_config_path}:/config.yaml"
         "${act_path}/stable-latest-main/data:/data"
         "/var/run/docker.sock:/var/run/docker.sock"
         "/nix:/nix"
@@ -43,7 +44,7 @@ in
         "com.centurylinklabs.watchtower.scope" = "act-runner";
       };
       volumes = [
-        "${act_path}/stable-latest-1/config.yaml:/config.yaml"
+        "${./act_config.yaml}:/config.yaml"
         "${act_path}/stable-latest-1/data:/data"
         "/var/run/docker.sock:/var/run/docker.sock"
         "/nix:/nix"
@@ -66,7 +67,7 @@ in
         "com.centurylinklabs.watchtower.scope" = "act-runner";
       };
       volumes = [
-        "${act_path}/stable-latest-2/config.yaml:/config.yaml"
+        "${act_config_path}:/config.yaml"
         "${act_path}/stable-latest-2/data:/data"
         "/var/run/docker.sock:/var/run/docker.sock"
         "/nix:/nix"

systems/palatine-hill/docker/act_config.yaml

@@ -0,0 +1,97 @@
+# Example configuration file, it's safe to copy this as the default config file without any modification.
+
+# You don't have to copy this file to your instance,
+# just run `./act_runner generate-config > config.yaml` to generate a config file.
+log:
+    # The level of logging, can be trace, debug, info, warn, error, fatal
+    level: info
+runner:
+    # Where to store the registration result.
+    file: .runner
+    # Execute how many tasks concurrently at the same time.
+    capacity: 1
+    # Extra environment variables to run jobs.
+    envs:
+        A_TEST_ENV_NAME_1: a_test_env_value_1
+        A_TEST_ENV_NAME_2: a_test_env_value_2
+    # Extra environment variables to run jobs from a file.
+    # It will be ignored if it's empty or the file doesn't exist.
+    env_file: .env
+    # The timeout for a job to be finished.
+    # Please note that the Gitea instance also has a timeout (3h by default) for the job.
+    # So the job could be stopped by the Gitea instance if it's timeout is shorter than this.
+    timeout: 3h
+    # The timeout for the runner to wait for running jobs to finish when shutting down.
+    # Any running jobs that haven't finished after this timeout will be cancelled.
+    shutdown_timeout: 0s
+    # Whether skip verifying the TLS certificate of the Gitea instance.
+    insecure: false
+    # The timeout for fetching the job from the Gitea instance.
+    fetch_timeout: 5s
+    # The interval for fetching the job from the Gitea instance.
+    fetch_interval: 2s
+    # The labels of a runner are used to determine which jobs the runner can run, and how to run them.
+    # Like: "macos-arm64:host" or "ubuntu-latest:docker://gitea/runner-images:ubuntu-latest"
+    # Find more images provided by Gitea at https://gitea.com/gitea/runner-images .
+    # If it's empty when registering, it will ask for inputting labels.
+    # If it's empty when execute `daemon`, will use labels in `.runner` file.
+    labels:
+        - "ubuntu-latest:docker://gitea/runner-images:ubuntu-latest"
+        - "ubuntu-22.04:docker://gitea/runner-images:ubuntu-22.04"
+        - "ubuntu-20.04:docker://gitea/runner-images:ubuntu-20.04"
+        #cache:
+    # Enable cache server to use actions/cache.
+    #enabled: true
+    # The directory to store the cache data.
+    # If it's empty, the cache data will be stored in $HOME/.cache/actcache.
+    #dir: ""
+    # The host of the cache server.
+    # It's not for the address to listen, but the address to connect from job containers.
+    # So 0.0.0.0 is a bad choice, leave it empty to detect automatically.
+    #host: ""
+    # The port of the cache server.
+    # 0 means to use a random available port.
+    #port: 0
+    # The external cache server URL. Valid only when enable is true.
+    # If it's specified, act_runner will use this URL as the ACTIONS_CACHE_URL rather than start a server by itself.
+    # The URL should generally end with "/".
+    #external_server: ""
+container:
+    # Specifies the network to which the container will connect.
+    # Could be host, bridge or the name of a custom network.
+    # If it's empty, act_runner will create a network automatically.
+    network: ""
+    # Whether to use privileged mode or not when launching task containers (privileged mode is required for Docker-in-Docker).
+    privileged: false
+    # And other options to be used when the container is started (eg, --add-host=my.gitea.url:host-gateway).
+    options:
+    # The parent directory of a job's working directory.
+    # NOTE: There is no need to add the first '/' of the path as act_runner will add it automatically. 
+    # If the path starts with '/', the '/' will be trimmed.
+    # For example, if the parent directory is /path/to/my/dir, workdir_parent should be path/to/my/dir
+    # If it's empty, /workspace will be used.
+    workdir_parent:
+    # Volumes (including bind mounts) can be mounted to containers. Glob syntax is supported, see https://github.com/gobwas/glob
+    # You can specify multiple volumes. If the sequence is empty, no volumes can be mounted.
+    # For example, if you only allow containers to mount the `data` volume and all the json files in `/src`, you should change the config to:
+    # valid_volumes:
+    #   - data
+    #   - /src/*.json
+    # If you want to allow any volume, please use the following configuration:
+    # valid_volumes:
+    #   - '**'
+    valid_volumes:
+        - /nix
+    # overrides the docker client host with the specified one.
+    # If it's empty, act_runner will find an available docker host automatically.
+    # If it's "-", act_runner will find an available docker host automatically, but the docker host won't be mounted to the job containers and service containers.
+    # If it's not empty or "-", the specified docker host will be used. An error will be returned if it doesn't work.
+    docker_host: ""
+    # Pull docker image(s) even if already present
+    force_pull: true
+    # Rebuild docker image(s) even if already present
+    force_rebuild: false
+host:
+    # The parent directory of a job's working directory.
+    # If it's empty, $HOME/.cache/act/ will be used.
+    workdir_parent: