diff --git a/Makefile b/Makefile
index 3f6b807..38d35a5 100644
--- a/Makefile
+++ b/Makefile
@@ -47,11 +47,15 @@ $(tarball) :
 
 docker : docker-debian11 docker-mint20 docker-ubuntu20 docker-ubuntu21 docker-fedora34 docker-fedora35
 
-build : debian11 mint20 ubuntu20 ubuntu21 fedora34 fedora35
+build : clean debian11 clean mint20 clean ubuntu20 clean ubuntu21 clean fedora34 clean fedora35 clean
 
 push :
-	docker push librewolf/bsys5-image-debian11 librewolf/bsys5-image-mint20 librewolf/bsys5-image-ubuntu20 librewolf/bsys5-image-ubuntu21 librewolf/bsys5-image-fedora34 librewolf/bsys5-image-fedora35
-
+	docker push librewolf/bsys5-image-debian11
+	docker push librewolf/bsys5-image-mint20
+	docker push librewolf/bsys5-image-ubuntu20
+	docker push librewolf/bsys5-image-ubuntu21
+	docker push librewolf/bsys5-image-fedora34
+	docker push librewolf/bsys5-image-fedora35
 
 work : $(tarball)
 	mkdir work
diff --git a/linux.Dockerfile b/linux.Dockerfile
index 8187115..a091cad 100644
--- a/linux.Dockerfile
+++ b/linux.Dockerfile
@@ -3,10 +3,16 @@ FROM $distro
 
 ENV version          96.0.3
 ENV source_release   3
-# we use this wasi version..
+
+# we use this wasi version
 ENV wasi_fullversion 14.0
 ENV wasi_mainversion 14
 
+# these ones seem to be needed by ubuntu
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Europe/Amsterdam
+
+
 # dependencies needed to run ./mach bootstrap
 RUN ( apt-get -y update && apt-get -y upgrade && apt-get -y install mercurial python3 python3-dev python3-pip wget ; true)
 RUN ( dnf -y upgrade && dnf -y install mercurial python3 python3-devel wget ; true)