diff --git a/build-tool.js b/build-tool.js
index 3a69152..fd8fc55 100644
--- a/build-tool.js
+++ b/build-tool.js
@@ -87,4 +87,7 @@ async function main () {
   }
 }
 
-main()
+main().catch(e => {
+  console.error(e.stack)
+  process.exit(1)
+})
diff --git a/deps/amd64.yaml b/deps/amd64.yaml
index bbf6a94..0c28477 100644
--- a/deps/amd64.yaml
+++ b/deps/amd64.yaml
@@ -1 +1 @@
-snaps:
+snaps: {}
diff --git a/deps/common.yaml b/deps/common.yaml
index bbf6a94..0c28477 100644
--- a/deps/common.yaml
+++ b/deps/common.yaml
@@ -1 +1 @@
-snaps:
+snaps: {}
diff --git a/deps/rpi2.yaml b/deps/rpi2.yaml
index bbf6a94..0c28477 100644
--- a/deps/rpi2.yaml
+++ b/deps/rpi2.yaml
@@ -1 +1 @@
-snaps:
+snaps: {}
diff --git a/deps/rpi3.yaml b/deps/rpi3.yaml
index bbf6a94..0c28477 100644
--- a/deps/rpi3.yaml
+++ b/deps/rpi3.yaml
@@ -1 +1 @@
-snaps:
+snaps: {}