ci(main): use cachix nix install action instead of determinate

Author: nialov

.github/workflows/main.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: DeterminateSystems/nix-installer-action@v21
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -65,7 +65,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: DeterminateSystems/nix-installer-action@v21
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -85,7 +85,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: DeterminateSystems/nix-installer-action@v21
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -97,7 +97,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: DeterminateSystems/nix-installer-action@v21
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -134,7 +134,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: DeterminateSystems/nix-installer-action@v21
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

nix/ci.nix

@@ -4,7 +4,7 @@ let
 
   inherit (inputs.actions-nix.lib.steps)
     actionsCheckout
-    DeterminateSystemsNixInstallerAction
+    cachixNixInstallerAction
     runNixFastBuild
     runNixFlakeCheckNoBuild
     cachixCachixAction
@@ -23,7 +23,7 @@ let
 
   baseNixSteps = [
     actionsCheckout
-    DeterminateSystemsNixInstallerAction
+    cachixNixInstallerAction
     {
       inherit (cachixCachixAction) uses;
       "with" = {