Merge remote-tracking branch 'refs/remotes/victorli2002/merge-substit…

…ution-builder' into victor-substitution-builder

.github/runs-on.yml

@@ -1,11 +1,12 @@
 images:
-  dlami-x64:
+  runs-on-gpu-pinned:
     platform: "linux"
     arch: "x64"
-    owner: "898082745236" # AWS
-    name: "Deep Learning Base OSS Nvidia Driver GPU AMI (Ubuntu 22.04)*"
+    owner: "135269210855" # runs-on
+    name: "runs-on-v2.2-ubuntu22-gpu-x64-20250123194414"
 
-runners:
-  gpu-nvidia:
-    family: ["g4dn.xlarge"]
-    image: dlami-x64
+  runs-on-cpu-pinned:
+    platform: "linux"
+    arch: "x64"
+    owner: "135269210855" # runs-on
+    name: "runs-on-v2.2-ubuntu22-full-x64-20250101080516"

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
           submodules: recursive
 
       - name: Free additional space on runner
-        run: ./.github/workflows/helpers/free_space_on_runner_gpu.sh
+        run: ./.github/workflows/helpers/free_space_on_runner.sh
 
       - name: Install nix
         uses: cachix/install-nix-action@v25
@@ -67,7 +67,7 @@ jobs:
     runs-on:
       - runs-on
       - family=g4dn.xlarge
-      - image=ubuntu22-full-x64
+      - image=runs-on-gpu-pinned
 
     strategy:
       max-parallel: 1
@@ -79,8 +79,9 @@ jobs:
         with:
           submodules: recursive
 
-      - name: free additional space on runner
-        run: ./.github/workflows/helpers/free_space_on_runner_gpu.sh
+      - name: mount ephemeral drive to nix
+        run: |
+          sudo mkdir $HOME/_work/nix && sudo mkdir /nix && sudo mount --bind $HOME/_work/nix /nix
 
       - name: install nix
         uses: cachix/install-nix-action@v25