diff --git a/README.md b/README.md
index 071d9df..d88a858 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,10 @@ be https://ziglang.org/download to avoid the official website being hit with lar
 If you've experienced issues with a default mirror, please open an issue, and I will communicate with the
 mirror's owner or remove it from the list.
 
+If necessary, the caching of the global Zig cache directory can be disabled by setting the option
+`use-cache: false`. Don't do this without reason: preserving the Zig cache will typically speed things up
+and decrease the load on GitHub's runners.
+
 [mach-nominated]: https://machengine.org/about/nominated-zig/
 
 ## Details
diff --git a/action.yml b/action.yml
index fb012ba..40f8376 100644
--- a/action.yml
+++ b/action.yml
@@ -9,6 +9,10 @@ inputs:
     description: 'Override of Zig download mirror to use, e.g. "https://pkg.machengine.org/zig".'
     required: false
     default: ''
+  use-cache:
+    description: 'Whether to cache the global Zig cache directory.'
+    required: true
+    default: true
 runs:
   using: 'node20'
   main: 'main.js'
diff --git a/main.js b/main.js
index 160badd..de21add 100644
--- a/main.js
+++ b/main.js
@@ -105,9 +105,13 @@ async function main() {
     }
 
     core.addPath(zig_dir);
-    await cache.restoreCache([await common.getZigCachePath()], await common.getCachePrefix());
+
     // Direct Zig to use the global cache as every local cache, so that we get maximum benefit from the caching above.
     core.exportVariable('ZIG_LOCAL_CACHE_DIR', await common.getZigCachePath());
+
+    if (core.getBooleanInput('use-cache')) {
+      await cache.restoreCache([await common.getZigCachePath()], await common.getCachePrefix());
+    }
   } catch (err) {
     core.setFailed(err.message);
   }
diff --git a/post.js b/post.js
index bf3567e..96bcab8 100644
--- a/post.js
+++ b/post.js
@@ -5,9 +5,11 @@ const common = require('./common');
 
 async function main() {
   try {
-    const prefix = await common.getCachePrefix();
-    const name = prefix + github.context.runId;
-    await cache.saveCache([await common.getZigCachePath()], name);
+    if (core.getBooleanInput('use-cache')) {
+      const prefix = await common.getCachePrefix();
+      const name = prefix + github.context.runId;
+      await cache.saveCache([await common.getZigCachePath()], name);
+    }
   } catch (err) {
     core.setFailed(err.message);
   }