install yarn

build/index.js

@@ -2503,6 +2503,7 @@ module.exports = require("util");
 const { execSync } = __webpack_require__(129);
 const core = __webpack_require__(470);
 const version = core.getInput("lix-version");
+execSync("npm install -g yarn");
 execSync("yarn global add lix" + (version ? `@${version}` : ""));
 const path = execSync("yarn global bin").toString().replaceAll("\n", "");
 core.addPath(path);

src/index.js

@@ -1,6 +1,7 @@
 const { execSync } = require("child_process");
 const core = require("@actions/core");
 const version = core.getInput("lix-version");
+execSync("npm install -g yarn");
 execSync("yarn global add lix" + (version ? `@${version}` : ""));
 const path = execSync("yarn global bin").toString().replaceAll("\n", "");
 core.addPath(path);