diff --git a/.drone.yml b/.drone.yml
index 0a7af301b..4921946a5 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -5,7 +5,7 @@ name: debian-unstable
 
 steps:
 - name: debian-build
-  image: dankamongmen/unstable_builder:2020-11-17b
+  image: dankamongmen/unstable_builder:2020-11-26b
   commands:
     - export LANG=en_US.UTF-8
     - mkdir build
diff --git a/tests/blit.cpp b/tests/blit.cpp
index e40d358a8..6adaafce1 100644
--- a/tests/blit.cpp
+++ b/tests/blit.cpp
@@ -1,5 +1,4 @@
 #include "main.h"
-#include <vector>
 
 // FIXME broken on big-endian, need turn WARNs back to CHECKs
 // https://github.com/dankamongmen/notcurses/issues/1130