diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b69cad9..d4469aa 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -27,6 +27,19 @@ jobs:
         with:
           extra_nix_config: |
             accept-flake-config = true
+            keep-outputs = true
+            keep-env-derivations = true
+      - name: Cache Nix store
+        uses: nix-community/cache-nix-action@v7
+        with:
+          primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix', 'devenv.lock', 'devenv.yaml') }}
+          restore-prefixes-first-match: nix-${{ runner.os }}-
+          gc-max-store-size-linux: 1G
+          purge: true
+          purge-prefixes: nix-${{ runner.os }}-
+          purge-created: 0
+          purge-last-accessed: P1DT12H
+          purge-primary-key: never
       - name: Set up cachix
         uses: cachix/cachix-action@v16
         with: