diff --git a/rollup.config.js b/rollup.config.js
index 9cea400..2d3592a 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,6 +1,8 @@
 import replace from '@rollup/plugin-replace';
 import terser from '@rollup/plugin-terser';
 import typescript from 'rollup-plugin-typescript2';
+
+import { execSync } from "node:child_process";
 import { readFile } from 'node:fs/promises';
 import { fileURLToPath } from 'node:url';
 
@@ -13,8 +15,20 @@ const commonPlugins = () => [
 		'self.BARE_MUX_VERSION': JSON.stringify(
 		  pkg.version
 		),
-	  }),
+		'self.BARE_MUX_COMMITHASH': (() => {
+			try {
+				let hash = JSON.stringify(
+					execSync("git rev-parse --short HEAD", {
+						encoding: "utf-8",
+					}).replace(/\r?\n|\r/g, "")
+				);
 
+				return hash;
+			} catch (e) {
+				return "unknown";
+			}
+		})(),
+	}),
 ];
 
 const configs = [
diff --git a/src/index.ts b/src/index.ts
index ae661c9..ffd085c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,4 +11,4 @@ export type * from './connection';
 export type * from "./snapshot";
 
 //@ts-expect-error this gets filled in
-console.debug(`bare-mux: running v${self.BARE_MUX_VERSION}`);
\ No newline at end of file
+console.debug(`bare-mux: running v${self.BARE_MUX_VERSION} (build ${self.BARE_MUX_COMMITHASH})`);
\ No newline at end of file
diff --git a/src/worker.ts b/src/worker.ts
index da84ca4..75d7a4d 100644
--- a/src/worker.ts
+++ b/src/worker.ts
@@ -88,4 +88,4 @@ self.onconnect = (event: MessageEvent) => {
 }
 
 //@ts-expect-error this gets filled in
-console.debug(`bare-mux: running v${self.BARE_MUX_VERSION}`);
\ No newline at end of file
+console.debug(`bare-mux: running v${self.BARE_MUX_VERSION} (build ${self.BARE_MUX_COMMITHASH})`);
\ No newline at end of file