diff --git a/.pnp.js b/.pnp.js
index 7e25f4f10..e4e96517a 100755
--- a/.pnp.js
+++ b/.pnp.js
@@ -40,6 +40,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["@babel/core", "npm:7.11.0"],
             ["@babel/plugin-proposal-class-properties", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@babel/plugin-proposal-decorators", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.5"],
+            ["@babel/plugin-proposal-nullish-coalescing-operator", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@babel/plugin-transform-modules-commonjs", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.8.3"],
             ["@babel/preset-typescript", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@types/debug", "npm:4.1.5"],
@@ -487,6 +488,23 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
           "linkType": "HARD",
         }]
       ]],
+      ["@babel/plugin-proposal-nullish-coalescing-operator", [
+        ["virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4", {
+          "packageLocation": "./.yarn/$$virtual/@babel-plugin-proposal-nullish-coalescing-operator-virtual-bd98b5d760/0/cache/@babel-plugin-proposal-nullish-coalescing-operator-npm-7.10.4-dd7a5fdb9c-5a20d8bcbf.zip/node_modules/@babel/plugin-proposal-nullish-coalescing-operator/",
+          "packageDependencies": [
+            ["@babel/plugin-proposal-nullish-coalescing-operator", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
+            ["@babel/core", "npm:7.11.0"],
+            ["@babel/helper-plugin-utils", "npm:7.10.4"],
+            ["@babel/plugin-syntax-nullish-coalescing-operator", "virtual:bd98b5d760bf6764f08ba70bbf309191487113e76cad7ab625345d176aafe8794d4418a3d1cce882bd210ecae1f155ab0c4932e4314122ae5026a8a5bdfb6d0e#npm:7.8.3"],
+            ["@types/babel__core", null]
+          ],
+          "packagePeers": [
+            "@babel/core",
+            "@types/babel__core"
+          ],
+          "linkType": "HARD",
+        }]
+      ]],
       ["@babel/plugin-syntax-bigint", [
         ["virtual:c35bc3215fec2d22c38f8c1112d7d34c3c55792cf1e9e148aa8755cb2680310d8e91f690f866e8073fe05de053b0487b1209bda10126d6a4d518f8f822a23126#npm:7.8.3", {
           "packageLocation": "./.yarn/$$virtual/@babel-plugin-syntax-bigint-virtual-cb6879adb0/0/cache/@babel-plugin-syntax-bigint-npm-7.8.3-b05d971e6c-8c9b610377.zip/node_modules/@babel/plugin-syntax-bigint/",
@@ -519,6 +537,22 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
           "linkType": "HARD",
         }]
       ]],
+      ["@babel/plugin-syntax-nullish-coalescing-operator", [
+        ["virtual:bd98b5d760bf6764f08ba70bbf309191487113e76cad7ab625345d176aafe8794d4418a3d1cce882bd210ecae1f155ab0c4932e4314122ae5026a8a5bdfb6d0e#npm:7.8.3", {
+          "packageLocation": "./.yarn/$$virtual/@babel-plugin-syntax-nullish-coalescing-operator-virtual-3353bb767f/0/cache/@babel-plugin-syntax-nullish-coalescing-operator-npm-7.8.3-8a723173b5-4ba0375375.zip/node_modules/@babel/plugin-syntax-nullish-coalescing-operator/",
+          "packageDependencies": [
+            ["@babel/plugin-syntax-nullish-coalescing-operator", "virtual:bd98b5d760bf6764f08ba70bbf309191487113e76cad7ab625345d176aafe8794d4418a3d1cce882bd210ecae1f155ab0c4932e4314122ae5026a8a5bdfb6d0e#npm:7.8.3"],
+            ["@babel/core", "npm:7.11.0"],
+            ["@babel/helper-plugin-utils", "npm:7.8.3"],
+            ["@types/babel__core", null]
+          ],
+          "packagePeers": [
+            "@babel/core",
+            "@types/babel__core"
+          ],
+          "linkType": "HARD",
+        }]
+      ]],
       ["@babel/plugin-syntax-object-rest-spread", [
         ["virtual:c35bc3215fec2d22c38f8c1112d7d34c3c55792cf1e9e148aa8755cb2680310d8e91f690f866e8073fe05de053b0487b1209bda10126d6a4d518f8f822a23126#npm:7.8.3", {
           "packageLocation": "./.yarn/$$virtual/@babel-plugin-syntax-object-rest-spread-virtual-229e140fb3/0/cache/@babel-plugin-syntax-object-rest-spread-npm-7.8.3-60bd05b6ae-db5dfb39fa.zip/node_modules/@babel/plugin-syntax-object-rest-spread/",
@@ -2568,6 +2602,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["@babel/core", "npm:7.11.0"],
             ["@babel/plugin-proposal-class-properties", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@babel/plugin-proposal-decorators", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.5"],
+            ["@babel/plugin-proposal-nullish-coalescing-operator", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@babel/plugin-transform-modules-commonjs", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.8.3"],
             ["@babel/preset-typescript", "virtual:0bda696f47fa4339976f909c007f0dc954386da51b8923bf264010d9929618071aa538c29b76d4b6c53f7388a7d83508f2a5027eb81cfc74b39b9d4a0b1a8c5a#npm:7.10.4"],
             ["@types/debug", "npm:4.1.5"],
diff --git a/.yarn/cache/@babel-plugin-proposal-nullish-coalescing-operator-npm-7.10.4-dd7a5fdb9c-5a20d8bcbf.zip b/.yarn/cache/@babel-plugin-proposal-nullish-coalescing-operator-npm-7.10.4-dd7a5fdb9c-5a20d8bcbf.zip
new file mode 100644
index 000000000..0d092e8bc
Binary files /dev/null and b/.yarn/cache/@babel-plugin-proposal-nullish-coalescing-operator-npm-7.10.4-dd7a5fdb9c-5a20d8bcbf.zip differ
diff --git a/.yarn/cache/@babel-plugin-syntax-nullish-coalescing-operator-npm-7.8.3-8a723173b5-4ba0375375.zip b/.yarn/cache/@babel-plugin-syntax-nullish-coalescing-operator-npm-7.8.3-8a723173b5-4ba0375375.zip
new file mode 100644
index 000000000..a8017790c
Binary files /dev/null and b/.yarn/cache/@babel-plugin-syntax-nullish-coalescing-operator-npm-7.8.3-8a723173b5-4ba0375375.zip differ
diff --git a/babel.config.js b/babel.config.js
index f055416f5..78f5926c0 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -6,5 +6,6 @@ module.exports = {
     [`@babel/plugin-proposal-decorators`, {legacy: true}],
     [`@babel/plugin-proposal-class-properties`, {loose: true}],
     [`@babel/plugin-transform-modules-commonjs`],
+    [`@babel/plugin-proposal-nullish-coalescing-operator`],
   ],
 };
diff --git a/package.json b/package.json
index fc3a9a8ed..914e0952d 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
     "@babel/core": "^7.11.0",
     "@babel/plugin-proposal-class-properties": "^7.10.4",
     "@babel/plugin-proposal-decorators": "^7.10.5",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.10.4",
     "@babel/plugin-transform-modules-commonjs": "^7.8.3",
     "@babel/preset-typescript": "^7.10.4",
     "@types/debug": "^4.1.5",
diff --git a/sources/pmmUtils.ts b/sources/pmmUtils.ts
index 455d56352..ed5278fb0 100644
--- a/sources/pmmUtils.ts
+++ b/sources/pmmUtils.ts
@@ -130,7 +130,13 @@ export async function installVersion(installTarget: string, locator: Locator, {s
 export async function runVersion(installSpec: { location: string, spec: PackageManagerSpec }, locator: Locator, binName: string, args: Array<string>, context: Context) {
   let binPath: string | null = null;
   if (Array.isArray(installSpec.spec.bin)) {
-    binPath = path.join(installSpec.location, `${binName}.js`);
+    if (installSpec.spec.bin.some(bin => bin === binName)) {
+      const parsedUrl = new URL(installSpec.spec.url);
+      const ext = path.posix.extname(parsedUrl.pathname);
+      if (ext === `.js`) {
+        binPath = path.join(installSpec.location, path.posix.basename(parsedUrl.pathname));
+      }
+    }
   } else {
     for (const [name, dest] of Object.entries(installSpec.spec.bin)) {
       if (name === binName) {
@@ -141,7 +147,7 @@ export async function runVersion(installSpec: { location: string, spec: PackageM
   }
 
   if (!binPath)
-    throw new Error(`Assertion failed: Unable to locate bin path`);
+    throw new Error(`Assertion failed: Unable to locate path for bin '${binName}'`);
 
   return new Promise<number>((resolve, reject) => {
     process.on(`SIGINT`, () => {
diff --git a/tests/Disable.test.ts b/tests/Disable.test.ts
index 7dd4bd528..3c9822ac1 100644
--- a/tests/Disable.test.ts
+++ b/tests/Disable.test.ts
@@ -9,7 +9,7 @@ import {runCli}                                    from './_runCli';
 const engine = new Engine();
 
 beforeEach(async () => {
-  process.env.COREPACK_HOME = await xfs.mktempPromise();
+  process.env.COREPACK_HOME = npath.fromPortablePath(await xfs.mktempPromise());
 });
 
 async function makeBin(cwd: PortablePath, name: Filename) {
diff --git a/tests/Enable.test.ts b/tests/Enable.test.ts
index 2cebe6766..500db0a14 100644
--- a/tests/Enable.test.ts
+++ b/tests/Enable.test.ts
@@ -9,7 +9,7 @@ import {runCli}                                               from './_runCli';
 const engine = new Engine();
 
 beforeEach(async () => {
-  process.env.COREPACK_HOME = await xfs.mktempPromise();
+  process.env.COREPACK_HOME = npath.fromPortablePath(await xfs.mktempPromise());
 });
 
 async function makeBin(cwd: PortablePath, name: Filename) {
diff --git a/tests/main.test.ts b/tests/main.test.ts
index 5f0a1e20d..07ad6118f 100644
--- a/tests/main.test.ts
+++ b/tests/main.test.ts
@@ -1,11 +1,11 @@
-import {Filename, ppath, xfs} from '@yarnpkg/fslib';
+import {Filename, ppath, xfs, npath} from '@yarnpkg/fslib';
 
-import config                 from '../config.json';
+import config                        from '../config.json';
 
-import {runCli}               from './_runCli';
+import {runCli}                      from './_runCli';
 
 beforeEach(async () => {
-  process.env.COREPACK_HOME = await xfs.mktempPromise();
+  process.env.COREPACK_HOME = npath.fromPortablePath(await xfs.mktempPromise());
 });
 
 for (const [name, version] of [[`yarn`, `1.22.4`], [`yarn`, `2.0.0-rc.30`], [`pnpm`, `4.11.6`], [`npm`, `6.14.2`]]) {
@@ -169,7 +169,7 @@ it(`should support hydrating package managers from cached archives`, async () =>
     });
 
     // Use a new cache
-    process.env.COREPACK_HOME = await xfs.mktempPromise();
+    process.env.COREPACK_HOME = npath.fromPortablePath(await xfs.mktempPromise());
 
     // Disable the network to make sure we don't succeed by accident
     process.env.COREPACK_ENABLE_NETWORK = `0`;
@@ -193,3 +193,21 @@ it(`should support hydrating package managers from cached archives`, async () =>
     }
   });
 });
+
+it(`should support running package managers with bin array`, async () => {
+  await xfs.mktempPromise(async cwd => {
+    await xfs.writeJsonPromise(ppath.join(cwd, `package.json` as Filename), {
+      packageManager: `yarn@2.2.2`,
+    });
+
+    await expect(runCli(cwd, [`yarn`, `yarnpkg`, `--version`])).resolves.toMatchObject({
+      stdout: `2.2.2\n`,
+      exitCode: 0,
+    });
+
+    await expect(runCli(cwd, [`yarn`, `yarn`, `--version`])).resolves.toMatchObject({
+      stdout: `2.2.2\n`,
+      exitCode: 0,
+    });
+  });
+});
diff --git a/yarn.lock b/yarn.lock
index e2eaaf2f4..de2c9d8eb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -403,6 +403,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@babel/plugin-proposal-nullish-coalescing-operator@npm:^7.10.4":
+  version: 7.10.4
+  resolution: "@babel/plugin-proposal-nullish-coalescing-operator@npm:7.10.4"
+  dependencies:
+    "@babel/helper-plugin-utils": ^7.10.4
+    "@babel/plugin-syntax-nullish-coalescing-operator": ^7.8.0
+  peerDependencies:
+    "@babel/core": ^7.0.0-0
+  checksum: 5a20d8bcbf2926dde3e9edcf847eaa5485d0d0fea76d0683ef1cafb11e0c35e46620391916283e1a9c0f76351e8c5ecccebf0d3a6bdf24559c5ad381433a0e3a
+  languageName: node
+  linkType: hard
+
 "@babel/plugin-syntax-bigint@npm:^7.0.0":
   version: 7.8.3
   resolution: "@babel/plugin-syntax-bigint@npm:7.8.3"
@@ -425,6 +437,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@babel/plugin-syntax-nullish-coalescing-operator@npm:^7.8.0":
+  version: 7.8.3
+  resolution: "@babel/plugin-syntax-nullish-coalescing-operator@npm:7.8.3"
+  dependencies:
+    "@babel/helper-plugin-utils": ^7.8.0
+  peerDependencies:
+    "@babel/core": ^7.0.0-0
+  checksum: 4ba03753759a2d9783b792c060147a20f474f76c42edf77cbf89c6669f9f22ffb3cbba4facdd8ce651129db6089a81feca1f7e42da75244eabedecba37bd20be
+  languageName: node
+  linkType: hard
+
 "@babel/plugin-syntax-object-rest-spread@npm:^7.0.0":
   version: 7.8.3
   resolution: "@babel/plugin-syntax-object-rest-spread@npm:7.8.3"
@@ -2212,6 +2235,7 @@ __metadata:
     "@babel/core": ^7.11.0
     "@babel/plugin-proposal-class-properties": ^7.10.4
     "@babel/plugin-proposal-decorators": ^7.10.5
+    "@babel/plugin-proposal-nullish-coalescing-operator": ^7.10.4
     "@babel/plugin-transform-modules-commonjs": ^7.8.3
     "@babel/preset-typescript": ^7.10.4
     "@types/debug": ^4.1.5