diff --git a/ex301/manualBuild.sh b/ex301/manualBuild.sh
new file mode 100755
index 0000000..33e6b19
--- /dev/null
+++ b/ex301/manualBuild.sh
@@ -0,0 +1,5 @@
+docker build --tag=tier/grouper-training-env:ex301.4.1 ex301.4.1 \
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  say exercises for 301 build complete
+fi
diff --git a/manualBuild.sh b/manualBuild.sh
index 37a4677..a94ffee 100755
--- a/manualBuild.sh
+++ b/manualBuild.sh
@@ -5,6 +5,10 @@ pushd ex201
 ./manualBuild.sh
 popd
 
+pushd ex301
+./manualBuild.sh
+popd
+
 pushd ex401
 ./manualBuild.sh
 popd