diff --git a/.github/workflows/test-cron.yaml b/.github/workflows/test-cron.yaml
index 7e42e666e5b..2353a773d7e 100644
--- a/.github/workflows/test-cron.yaml
+++ b/.github/workflows/test-cron.yaml
@@ -52,7 +52,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: Linux-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: Linux-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -61,20 +61,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'Linux-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'Linux-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - id: get-engine-hash
       name: Get native engine hash
       run: 'echo "::set-output name=hash::$(./build-support/bin/rust/print_engine_hash.sh)"
@@ -195,7 +186,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -204,20 +195,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - id: get-engine-hash
       name: Get native engine hash
       run: 'echo "::set-output name=hash::$(./build-support/bin/rust/print_engine_hash.sh)"
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 4277a2f86bf..2a6c1489680 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -55,7 +55,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: Linux-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: Linux-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -64,20 +64,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'Linux-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'Linux-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - id: get-engine-hash
       name: Get native engine hash
       run: 'echo "::set-output name=hash::$(./build-support/bin/rust/print_engine_hash.sh)"
@@ -200,7 +191,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -209,20 +200,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - id: get-engine-hash
       name: Get native engine hash
       run: 'echo "::set-output name=hash::$(./build-support/bin/rust/print_engine_hash.sh)"
@@ -415,7 +397,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: macOS10-15-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: macOS10-15-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -424,20 +406,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'macOS10-15-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'macOS10-15-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - env:
         ARCHFLAGS: -arch x86_64
       if: github.event_name == 'push' || !contains(env.COMMIT_MESSAGE, '[ci skip-build-wheels]')
@@ -519,7 +492,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: macOS11-ARM64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: macOS11-ARM64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -528,20 +501,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'macOS11-ARM64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'macOS11-ARM64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - id: get-engine-hash
       name: Get native engine hash
       run: 'echo "::set-output name=hash::$(./build-support/bin/rust/print_engine_hash.sh)"
@@ -658,7 +622,7 @@ jobs:
     - name: Cache Rust toolchain
       uses: actions/cache@v3
       with:
-        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v1
+        key: macOS11-x86_64-rustup-${{ hashFiles('rust-toolchain') }}-v2
         path: '~/.rustup/toolchains/1.64.0-*
 
           ~/.rustup/update-hashes
@@ -667,20 +631,11 @@ jobs:
 
           '
     - name: Cache Cargo
-      uses: actions/cache@v3
+      uses: benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1
       with:
-        key: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-${{ hashFiles(''src/rust/engine/Cargo.*'')
-          }}-v1
-
-          '
-        path: '~/.cargo/registry
-
-          ~/.cargo/git
-
-          '
-        restore-keys: 'macOS11-x86_64-cargo-${{ hashFiles(''rust-toolchain'') }}-
-
-          '
+        cache-bin: 'false'
+        shared-key: engine
+        workspaces: src/rust/engine
     - env:
         ARCHFLAGS: -arch x86_64
       if: github.event_name == 'push' || !contains(env.COMMIT_MESSAGE, '[ci skip-build-wheels]')
diff --git a/build-support/bin/generate_github_workflows.py b/build-support/bin/generate_github_workflows.py
index c5efd348154..8b9cd9551e1 100644
--- a/build-support/bin/generate_github_workflows.py
+++ b/build-support/bin/generate_github_workflows.py
@@ -243,28 +243,6 @@ def install_rustup() -> Step:
     }
 
 
-def rust_caches() -> Sequence[Step]:
-    return [
-        {
-            "name": "Cache Rust toolchain",
-            "uses": "actions/cache@v3",
-            "with": {
-                "path": f"~/.rustup/toolchains/{rust_channel()}-*\n~/.rustup/update-hashes\n~/.rustup/settings.toml\n",
-                "key": f"{gha_expr('runner.os')}-rustup-{hashFiles('rust-toolchain')}-v1",
-            },
-        },
-        {
-            "name": "Cache Cargo",
-            "uses": "actions/cache@v3",
-            "with": {
-                "path": "~/.cargo/registry\n~/.cargo/git\n",
-                "key": f"{gha_expr('runner.os')}-cargo-{hashFiles('rust-toolchain')}-{hashFiles('src/rust/engine/Cargo.*')}-v1\n",
-                "restore-keys": f"{gha_expr('runner.os')}-cargo-{hashFiles('rust-toolchain')}-\n",
-            },
-        },
-    ]
-
-
 def install_jdk() -> Step:
     return {
         "name": "Install AdoptJDK",
@@ -403,16 +381,22 @@ def rust_caches(self) -> Sequence[Step]:
                 "uses": "actions/cache@v3",
                 "with": {
                     "path": f"~/.rustup/toolchains/{rust_channel()}-*\n~/.rustup/update-hashes\n~/.rustup/settings.toml\n",
-                    "key": f"{self.platform_name()}-rustup-{hashFiles('rust-toolchain')}-v1",
+                    "key": f"{self.platform_name()}-rustup-{hashFiles('rust-toolchain')}-v2",
                 },
             },
             {
                 "name": "Cache Cargo",
-                "uses": "actions/cache@v3",
+                "uses": "benjyw/rust-cache@461b9f8eee66b575bce78977bf649b8b7a8d53f1",
                 "with": {
-                    "path": "~/.cargo/registry\n~/.cargo/git\n",
-                    "key": f"{self.platform_name()}-cargo-{hashFiles('rust-toolchain')}-{hashFiles('src/rust/engine/Cargo.*')}-v1\n",
-                    "restore-keys": f"{self.platform_name()}-cargo-{hashFiles('rust-toolchain')}-\n",
+                    # If set, replaces the job id in the cache key, so that the cache is stable across jobs.
+                    # If we don't set this, each job may restore from a previous job's cache entry (via a
+                    # restore key) but will write its own entry, even if there were no rust changes.
+                    # This will cause us to hit the 10GB limit much sooner, and also spend time uploading
+                    # identical cache entries unnecessarily.
+                    "shared-key": "engine",
+                    "workspaces": "src/rust/engine",
+                    # A custom option from our fork of the action.
+                    "cache-bin": "false",
                 },
             },
         ]
@@ -591,6 +575,8 @@ def test_python_linux(shard: str) -> dict[str, Any]:
                     **helper.build_wheels_common,
                     "steps": [
                         *checkout(containerized=True),
+                        # TODO: Why is this necessary? the hosted container is
+                        #  supposed to come with rustup preinstalled.
                         install_rustup(),
                         {
                             "name": "Expose Pythons",