diff --git a/Makefile b/Makefile
index 400e4820ed..837be3f7e2 100644
--- a/Makefile
+++ b/Makefile
@@ -312,7 +312,7 @@ ifeq ($(IN_DOCKER),1)
 else
 	docker run --rm --workdir /mnt --volume $(CURDIR):/mnt $(ISO_DOCKER_EXTRA_ARGS) \
 		--user $(shell id -u):$(shell id -g) --env HOME=/tmp --env IN_DOCKER=1 \
-		$(ISO_BUILD_IMAGE) /usr/bin/make out/minikube.iso
+		$(ISO_BUILD_IMAGE) /bin/bash -lc '/usr/bin/make out/minikube.iso'
 endif
 
 iso_in_docker:
diff --git a/deploy/iso/minikube-iso/Dockerfile b/deploy/iso/minikube-iso/Dockerfile
index 3b9a94f96b..21906ca2b4 100644
--- a/deploy/iso/minikube-iso/Dockerfile
+++ b/deploy/iso/minikube-iso/Dockerfile
@@ -15,7 +15,8 @@
 FROM ubuntu:18.04
 
 RUN apt-get update \
-	&& apt-get install -y apt dpkg apt-utils ca-certificates \
+	&& apt-get install -y apt dpkg apt-utils ca-certificates software-properties-common \
+	&& add-apt-repository -y ppa:longsleep/golang-backports \
 	&& apt-get upgrade -y \
 	&& apt-get install -y \
 		build-essential \