diff --git a/.github/workflows/build-ghosttykit.yml b/.github/workflows/build-ghosttykit.yml
index bf89ae2d..7fd65884 100644
--- a/.github/workflows/build-ghosttykit.yml
+++ b/.github/workflows/build-ghosttykit.yml
@@ -60,6 +60,14 @@ jobs:
           export DEVELOPER_DIR="$XCODE_DIR"
           xcodebuild -version
 
+      - name: Cache Zig packages
+        if: steps.check-release.outputs.exists == 'false'
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
+        with:
+          path: ~/.cache/zig
+          key: zig-packages-${{ hashFiles('ghostty/build.zig.zon', 'ghostty/build.zig.zon.json') }}
+          restore-keys: zig-packages-
+
       - name: Build GhosttyKit.xcframework
         if: steps.check-release.outputs.exists == 'false'
         run: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b7063f6..76c15434 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -129,6 +129,13 @@ jobs:
             zig version
           fi
 
+      - name: Cache Zig packages
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
+        with:
+          path: ~/.cache/zig
+          key: zig-packages-${{ hashFiles('ghostty/build.zig.zon', 'ghostty/build.zig.zon.json') }}
+          restore-keys: zig-packages-
+
       - name: Cache DerivedData
         uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
         with:
@@ -293,6 +300,13 @@ jobs:
             zig version
           fi
 
+      - name: Cache Zig packages
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
+        with:
+          path: ~/.cache/zig
+          key: zig-packages-${{ hashFiles('ghostty/build.zig.zon', 'ghostty/build.zig.zon.json') }}
+          restore-keys: zig-packages-
+
       - name: Cache DerivedData
         uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
         with:
@@ -447,6 +461,13 @@ jobs:
             zig version
           fi
 
+      - name: Cache Zig packages
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
+        with:
+          path: ~/.cache/zig
+          key: zig-packages-${{ hashFiles('ghostty/build.zig.zon', 'ghostty/build.zig.zon.json') }}
+          restore-keys: zig-packages-
+
       - name: Cache Swift packages
         uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4
         with: