diff --git a/README.md b/README.md
index d94b99b..eaf280f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ This action runs cached `esy install` and `esy build` in the current directory
   `${{ hashFiles('esy.lock/index.json') }}`
 - `esy-prefix`: The prefix of esy folder
 - `working-directory`: Working directory.
+- `manifest`: JSON or opam file to be used
 
 ## Example usage
 
diff --git a/action.yml b/action.yml
index 2ac98b1..1d2a616 100644
--- a/action.yml
+++ b/action.yml
@@ -10,6 +10,9 @@ inputs:
   esy-prefix:
     description: Prefix of esy folder
     required: false
+  manifest:
+    description: JSON or opam file to be used
+    required: false
 runs:
   using: node12
   main: dist/index.js
diff --git a/dist/index.js b/dist/index.js
index 4e86884..bdbe4c6 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -48437,6 +48437,13 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
         if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
     }
 };
+var __spreadArrays = (this && this.__spreadArrays) || function () {
+    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
+    for (var r = Array(s), k = 0, i = 0; i < il; i++)
+        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
+            r[k] = a[j];
+    return r;
+};
 exports.__esModule = true;
 var cache = __webpack_require__(7799);
 var core = __webpack_require__(2186);
@@ -48446,6 +48453,7 @@ var os = __webpack_require__(2087);
 var path = __webpack_require__(5622);
 var esyPrefix = core.getInput("esy-prefix");
 var cacheKey = core.getInput("cache-key");
+var manifestKey = core.getInput("manifest");
 function run(name, command, args) {
     return __awaiter(this, void 0, void 0, function () {
         var PATH;
@@ -48463,6 +48471,9 @@ function run(name, command, args) {
         });
     });
 }
+function runEsyCommand(name, args) {
+    return run(name, "esy", manifestKey ? __spreadArrays(["@" + manifestKey], args) : args);
+}
 function main() {
     return __awaiter(this, void 0, void 0, function () {
         var workingDirectory, platform, installPath, installKey, installCacheKey, ESY_FOLDER, esy3, depsPath, buildKey, restoreKeys, buildCacheKey, e_1;
@@ -48484,7 +48495,7 @@ function main() {
                         console.log("Restored the install cache");
                     }
                     core.endGroup();
-                    return [4 /*yield*/, run("Run esy install", "esy", ["install"])];
+                    return [4 /*yield*/, runEsyCommand("Run esy install", ["install"])];
                 case 2:
                     _a.sent();
                     if (!(installCacheKey != installKey)) return [3 /*break*/, 4];
@@ -48511,11 +48522,11 @@ function main() {
                     }
                     core.endGroup();
                     if (!!buildCacheKey) return [3 /*break*/, 7];
-                    return [4 /*yield*/, run("Run esy build-dependencies", "esy", ["build-dependencies"])];
+                    return [4 /*yield*/, runEsyCommand("Run esy build-dependencies", ["build-dependencies"])];
                 case 6:
                     _a.sent();
                     _a.label = 7;
-                case 7: return [4 /*yield*/, run("Run esy build", "esy", ["build"])];
+                case 7: return [4 /*yield*/, runEsyCommand("Run esy build", ["build"])];
                 case 8:
                     _a.sent();
                     if (!(buildCacheKey != buildKey)) return [3 /*break*/, 10];
@@ -48524,7 +48535,7 @@ function main() {
                     _a.sent();
                     _a.label = 10;
                 case 10:
-                    if (!!buildCacheKey) return [3 /*break*/, 12];
+                    if (!(!manifestKey && !buildCacheKey)) return [3 /*break*/, 12];
                     return [4 /*yield*/, run("Run esy cleanup", "esy", ["cleanup", "."])];
                 case 11:
                     _a.sent();
diff --git a/index.ts b/index.ts
index 7a3334c..f0060a0 100644
--- a/index.ts
+++ b/index.ts
@@ -7,6 +7,7 @@ import * as path from "path";
 
 const esyPrefix = core.getInput("esy-prefix");
 const cacheKey = core.getInput("cache-key");
+const manifestKey = core.getInput("manifest");
 
 async function run(name: string, command: string, args: string[]) {
   const PATH = process.env.PATH ? process.env.PATH : "";
@@ -14,6 +15,9 @@ async function run(name: string, command: string, args: string[]) {
   await exec(command, args, { env: { ...process.env, PATH } });
   core.endGroup();
 }
+function runEsyCommand(name: string, args: string[]) {
+  return run(name, "esy", manifestKey ? [`@${manifestKey}`, ...args] : args);
+}
 
 async function main() {
   try {
@@ -36,7 +40,7 @@ async function main() {
     }
     core.endGroup();
 
-    await run("Run esy install", "esy", ["install"]);
+    await runEsyCommand("Run esy install", ["install"]);
 
     if (installCacheKey != installKey) {
       await cache.saveCache(installPath, installKey);
@@ -65,16 +69,17 @@ async function main() {
     core.endGroup();
 
     if (!buildCacheKey) {
-      await run("Run esy build-dependencies", "esy", ["build-dependencies"]);
+      await runEsyCommand("Run esy build-dependencies", ["build-dependencies"]);
     }
 
-    await run("Run esy build", "esy", ["build"]);
+    await runEsyCommand("Run esy build", ["build"]);
 
     if (buildCacheKey != buildKey) {
       await cache.saveCache(depsPath, buildKey);
     }
 
-    if (!buildCacheKey) {
+    // TODO: support cleanup + manifest
+    if (!manifestKey && !buildCacheKey) {
       await run("Run esy cleanup", "esy", ["cleanup", "."]);
     }
   } catch (e) {