diff --git a/action.yml b/action.yml
index d20981c..b7d4e21 100644
--- a/action.yml
+++ b/action.yml
@@ -14,6 +14,9 @@ inputs:
   target-dir:
     description: "The target dir that should be cleaned and persisted, defaults to `./target`"
     required: false
+  workspace-paths:
+    description: "Paths to multiple Cargo workspaces, separated by newlines"
+    required: false
   cache-on-failure:
     description: "Cache even if the build fails. Defaults to false"
     required: false
diff --git a/src/common.ts b/src/common.ts
index b8f6187..b74ed83 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -186,16 +186,24 @@ interface Meta {
   }>;
 }
 
-export async function getPackages(): Promise<Packages> {
+export async function getPackages(workspacePaths: Array<string>): Promise<Packages> {
   const cwd = process.cwd();
-  const meta: Meta = JSON.parse(await getCmdOutput("cargo", ["metadata", "--all-features", "--format-version", "1"]));
 
-  return meta.packages
-    .filter((p) => !p.manifest_path.startsWith(cwd))
-    .map((p) => {
-      const targets = p.targets.filter((t) => t.kind[0] === "lib").map((t) => t.name);
-      return { name: p.name, version: p.version, targets, path: path.dirname(p.manifest_path) };
-    });
+  let allPackages: Packages = [];
+  for (const workspacePath of workspacePaths) {
+    process.chdir(workspacePath);
+    const meta: Meta = JSON.parse(await getCmdOutput("cargo", ["metadata", "--all-features", "--format-version", "1"]));
+    const workspacePackages = meta.packages
+      .filter((p) => !p.manifest_path.startsWith(cwd))
+      .map((p) => {
+        const targets = p.targets.filter((t) => t.kind[0] === "lib").map((t) => t.name);
+        return { name: p.name, version: p.version, targets, path: path.dirname(p.manifest_path) };
+      });
+    allPackages = allPackages.concat(workspacePackages);
+  }
+
+  process.chdir(cwd);
+  return allPackages;
 }
 
 export async function cleanTarget(targetDir: string, packages: Packages) {
diff --git a/src/restore.ts b/src/restore.ts
index b769791..7918aa2 100644
--- a/src/restore.ts
+++ b/src/restore.ts
@@ -33,7 +33,7 @@ async function run() {
 
       if (restoreKey !== key) {
         // pre-clean the target directory on cache mismatch
-        const packages = await getPackages();
+        const packages = await getPackages(workspaces);
 
         for (const workspace of workspaces) {
           const target = path.join(workspace, "target");
diff --git a/src/save.ts b/src/save.ts
index 27bdbe3..c28dec5 100644
--- a/src/save.ts
+++ b/src/save.ts
@@ -35,7 +35,7 @@ async function run() {
     await macOsWorkaround();
 
     const registryName = await getRegistryName();
-    const packages = await getPackages();
+    const packages = await getPackages(workspaces);
 
     if (registryName) {
       try {