diff --git a/ui/build b/ui/build
index 83e6d0315e..8d0b27c5ed 100755
--- a/ui/build
+++ b/ui/build
@@ -67,7 +67,7 @@ else
     parallel --gnu $P_OPTS build_plugin site ::: $site_plugins
     parallel --gnu $P_OPTS build_plugin round ::: $round_plugins
     parallel --gnu $P_OPTS build_plugin analyse ::: $analyse_plugins
-    parallel --gnu $P_OPTS build_plugin analyse ::: $puzzle_plugins
+    parallel --gnu $P_OPTS build_plugin puzzle ::: $puzzle_plugins
   else # sequential execution
     echo "For faster builds, install GNU parallel."
     for app in $apps1 $apps2 $apps3; do (build $app); done
diff --git a/ui/puzzle/src/dashboard.ts b/ui/puzzle/src/dashboard.ts
index 88121b586d..9683ae8336 100644
--- a/ui/puzzle/src/dashboard.ts
+++ b/ui/puzzle/src/dashboard.ts
@@ -1,7 +1,7 @@
-import Chart from 'chart.js';
+import { Chart } from 'chart.js';
 
 export function renderRadar(data: any) {
-  const canvas = document.querySelector('.puzzle-dashboard__radar')!.getContext("2d");
+  const canvas = document.querySelector('.puzzle-dashboard__radar') as HTMLCanvasElement;
   const d = data.radar;
   const dark = $('body').hasClass('dark');
   d.datasets[0] = {