diff --git a/changelog.d/111.bugfix b/changelog.d/111.bugfix
new file mode 100644
index 00000000..ec420fa1
--- /dev/null
+++ b/changelog.d/111.bugfix
@@ -0,0 +1 @@
+Fix an issue introduced in #111 that would cause the build to fail in CI.
\ No newline at end of file
diff --git a/docs/_site/style.css b/docs/_site/style.css
index d8cdcc47..7971d15b 100644
--- a/docs/_site/style.css
+++ b/docs/_site/style.css
@@ -12,6 +12,7 @@
 }
 
 .warning {
+    color: black;
     border: 2px solid #dda02f;
     border-left-width: 2px;
     border-left-width: 5px;
diff --git a/package.json b/package.json
index ee0ca48c..9cbf5690 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "build:app:fix-defs": "ts-node scripts/definitions-fixer.ts src/libRs.d.ts",
     "build:docs": "ts-node scripts/build-metrics-docs.ts > docs/metrics.md && mdbook build",
     "dev:web": "snowpack dev",
-    "build": "yarn run build:web && yarn run build:app:rs && yarn run build:app:fix-defs && yarn run build:app",
+    "build": "scripts/build-app.sh",
     "prepare": "yarn build",
     "start": "node --require source-map-support/register lib/App/BridgeApp.js",
     "start:app": "node --require source-map-support/register lib/App/BridgeApp.js",
diff --git a/scripts/build-app.sh b/scripts/build-app.sh
new file mode 100755
index 00000000..149d0d5d
--- /dev/null
+++ b/scripts/build-app.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# exit when any command fails
+set -e
+
+echo "Building web"
+yarn run build:web
+echo "Building Rust layer"
+yarn run build:app:rs
+echo "Running rust-typescript definitions fix"
+yarn run build:app:fix-defs
+echo "Building Typescript layer"
+yarn run build:app
diff --git a/scripts/definitions-fixer.ts b/scripts/definitions-fixer.ts
index 90808c2d..42718e48 100644
--- a/scripts/definitions-fixer.ts
+++ b/scripts/definitions-fixer.ts
@@ -4,13 +4,15 @@ import { promises as fs } from "fs";
 
 async function processDefFile() {
   const path = process.argv[process.argv.length-1];
+
   // Read the whole file in to prevent us writing over ourselves.
   const file = await fs.readFile(path, "utf-8");
   const out = await fs.open(path, 'w');
   for (const line of file.split('\n')) {
     const match = / {2}(\w+\.[\w.-]+):/g.exec(line);
-    out.write((match ? line.replace(match[1], `"${match[1]}"`) : line) + "\n");
+    await out.write((match ? line.replace(match[1], `"${match[1]}"`) : line) + "\n");
   }
+  await out.close();
 }
 
 processDefFile().catch((ex) => {