diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..5f9167c
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,10 @@
+kind: pipeline
+name: build
+
+steps:
+  - name: build
+    image: turboregistry:5000/juju/turbo-ci
+    commands:
+      - ./autogen.sh
+      - ./configure
+      - make
diff --git a/src/message/message.hh b/src/message/message.hh
index 6797f00..24dd653 100644
--- a/src/message/message.hh
+++ b/src/message/message.hh
@@ -1,5 +1,6 @@
 #pragma once
 #include <unordered_map>
+#include <optional>
 
 #include "misc/buffer.hh"
 #include "legislator/legislator.hh"
diff --git a/src/misc/addrinfo/addrinfo.cc b/src/misc/addrinfo/addrinfo.cc
index 59e4745..d33f450 100644
--- a/src/misc/addrinfo/addrinfo.cc
+++ b/src/misc/addrinfo/addrinfo.cc
@@ -18,7 +18,7 @@ namespace misc
 
 std::ostream& operator<<(std::ostream& os, const addrinfo&)
 {
-    os << "addrinfo{"
-       << "}";
+    os << std::string("addrinfo{")
+       << std::string("}");
     return os;
 }