diff --git a/build-dendritejs.sh b/build-dendritejs.sh
new file mode 100755
index 000000000..cd42a6bee
--- /dev/null
+++ b/build-dendritejs.sh
@@ -0,0 +1,4 @@
+#!/bin/bash -eu
+
+export GIT_COMMIT=$(git rev-list -1 HEAD) && \
+GOOS=js GOARCH=wasm go build -ldflags "-X main.GitCommit=$GIT_COMMIT" -o main.wasm ./cmd/dendritejs
\ No newline at end of file
diff --git a/cmd/dendritejs/main.go b/cmd/dendritejs/main.go
index 618ebbc60..5bdf18efa 100644
--- a/cmd/dendritejs/main.go
+++ b/cmd/dendritejs/main.go
@@ -46,8 +46,10 @@ import (
 	_ "github.com/matrix-org/go-sqlite3-js"
 )
 
+var GitCommit string
+
 func init() {
-	fmt.Println("dendrite.js starting...")
+	fmt.Printf("[%s] dendrite.js starting...\n", GitCommit)
 }
 
 const keyNameEd25519 = "_go_ed25519_key"