diff --git a/scripts/build-in-docker.sh b/scripts/build-in-docker.sh
index d426c9e..1fdf851 100755
--- a/scripts/build-in-docker.sh
+++ b/scripts/build-in-docker.sh
@@ -86,7 +86,11 @@ while test $# -gt 0; do
                 (rpm|zypper) img="opensuse:latest";;
                 (yum) img="centos:latest";;
                 (dnf) img="fedora:latest";;
-                (win) img="ubuntu:latest"; host="${host:---host=i686-w64-mingw32}";;
+                (win)
+                    img="ubuntu:latest"; host="${host:---host=i686-w64-mingw32}"
+                    targets="all install"
+                    flags+=("--prefix=/workdir/usr")
+                    ;;
                 (*)
                     echo "**** ERROR: unknown mode '$1', try --help" 1>&2
                     exit 1