diff --git a/ubt/README.md b/ubt/README.md
index 07b96a6..ac5b23e 100644
--- a/ubt/README.md
+++ b/ubt/README.md
@@ -60,6 +60,7 @@ ii  libgnutlsxx28:amd64            3.6.13-2ubuntu1.8                 amd64
 
 ```bash
 # tiger/build.sh
+# root@VM-12-9-ubuntu:~# docker run -it --rm infrastlabs/x11-base:ubt-builder bash
 cd /tmp/tigervnc && cmake -G "Unix Makefiles" \
     $(xx-clang --print-cmake-defines) \
     -DCMAKE_FIND_ROOT_PATH=$(xx-info sysroot) \
@@ -151,6 +152,7 @@ root@e0dd2368ee99:/tmp/tigervnc/unix/xserver#
 
 ```bash
 # err libnetwork.la
+# root@VM-12-9-ubuntu:/opt/working/_ee/ubt-armv7/ubt-core# docker run -it --rm -v $(pwd)/src/arm:/src/arm infrastlabs/docker-headless:core-compile
 # cd /tmp/tigervnc
 cd /build/tigervnc-1.12.0
 cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=/usr \