diff --git a/spine-ts/package.json b/spine-ts/package.json
index 5e217701f..4cbf5897a 100644
--- a/spine-ts/package.json
+++ b/spine-ts/package.json
@@ -18,7 +18,7 @@
     "build:core:esm": "npx esbuild --bundle spine-core/src/index.ts --tsconfig=spine-core/tsconfig.json --sourcemap --outfile=spine-core/dist/esm/spine-core.mjs --format=esm --global-name=spine",
     "build:construct3": "npx tsc --project spine-construct3/tsconfig.json && npm run build:construct3:copy-assets",
     "build:construct3:copy-assets": "npx copyfiles -u 2 \"spine-construct3/src/**/*.json\" \"spine-construct3/src/**/*.svg\" spine-construct3/dist/ && npx copyfiles -u 3 spine-construct3-lib/dist/iife/spine-construct3-lib.js spine-construct3/dist/c3runtime",
-    "build:construct3-lib": "node spine-construct3-lib/esbuild.config.js",
+    "build:construct3-lib": "npx esbuild --bundle spine-construct3-lib/src/index.ts --tsconfig=spine-construct3-lib/tsconfig.json --sourcemap --outfile=spine-construct3-lib/dist/iife/spine-construct3-lib.js --format=iife --global-name=spine --footer:js='if(!globalThis.spine)globalThis.spine=spine;'",
     "build:canvas:iife": "npx esbuild --bundle spine-canvas/src/index.ts --tsconfig=spine-canvas/tsconfig.json --sourcemap --outfile=spine-canvas/dist/iife/spine-canvas.js --format=iife --global-name=spine",
     "build:canvas:esm": "npx esbuild --bundle spine-canvas/src/index.ts --tsconfig=spine-canvas/tsconfig.json --sourcemap --outfile=spine-canvas/dist/esm/spine-canvas.mjs --format=esm --global-name=spine",
     "build:canvaskit:iife": "npx esbuild --bundle spine-canvaskit/src/index.ts --tsconfig=spine-canvaskit/tsconfig.json --sourcemap --outfile=spine-canvaskit/dist/iife/spine-canvaskit.js --external:canvaskit-wasm --format=iife --global-name=spine",
diff --git a/spine-ts/spine-construct3-lib/esbuild.config.js b/spine-ts/spine-construct3-lib/esbuild.config.js
deleted file mode 100644
index e9d2b444b..000000000
--- a/spine-ts/spine-construct3-lib/esbuild.config.js
+++ /dev/null
@@ -1,52 +0,0 @@
-// build.js
-import * as fs from 'node:fs';
-import * as esbuild from 'esbuild';
-
-// Plugin to append string after build
-const appendStringPlugin = {
-  name: 'append-string',
-  setup(build) {
-    build.onEnd((result) => {
-      if (result.errors.length === 0) {
-        const outputFile = 'spine-construct3-lib/dist/iife/spine-construct3-lib.js';
-
-        try {
-          const content = fs.readFileSync(outputFile, 'utf8');
-          const appendString = 'if(!globalThis.spine)globalThis.spine=spine';
-
-          // Only append if not already present
-          if (!content.includes(appendString)) {
-            fs.writeFileSync(outputFile, `${content}\n${appendString}`);
-            console.log('✓ Appended spine global assignment');
-          }
-        } catch (err) {
-          console.error('Error appending string:', err);
-        }
-      }
-    });
-  }
-};
-
-// Check if watch mode is requested
-const isWatch = process.argv.includes('--watch');
-
-// Build configuration
-const buildOptions = {
-  entryPoints: ['spine-construct3-lib/src/index.ts'],
-  bundle: true,
-  outfile: 'spine-construct3-lib/dist/iife/spine-construct3-lib.js',
-  tsconfig: 'spine-construct3-lib/tsconfig.json',
-  sourcemap: true,
-  format: 'iife',
-  globalName: 'spine',
-  plugins: [appendStringPlugin],
-};
-
-if (isWatch) {
-  const ctx = await esbuild.context(buildOptions);
-  await ctx.watch();
-  console.log('👀 Watching for changes...');
-} else {
-  await esbuild.build(buildOptions);
-  console.log('✅ Build complete');
-}
\ No newline at end of file