diff --git a/Makefile b/Makefile
index 8ef6939..9bccc53 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,13 @@
 include config.env
 include source-branch.env
 
+# arch_uname is the platform architecture according to the uname program.  Can be differ by OS, e.g. `arm64` on macOS, but `aarch64` on Linux.
+arch_uname := $(shell uname -m)
+# arch_go is the platform architecture in Go-style (e.g. amd64, ppc64le, s390x or arm64).
+arch_go := $(if $(findstring x86_64,$(arch_uname)),amd64,$(if $(findstring aarch64,$(arch_uname)),arm64,$(arch_uname)))
+# ARCH is the platform architecture in Go-style (e.g. amd64, ppc64le, s390x or arm64).
+# Override this to build an image for a different architecture.  Note that RUN instructions will not be able to succeed without the help of emulation provided by packages like qemu-user-static.
+ARCH ?= $(arch_go)
 # RELEASE shows what release of the container code has been built
 RELEASE ?=
 # MQ_ARCHIVE_REPOSITORY is a remote repository from which to pull the MQ_ARCHIVE (if required)
@@ -60,8 +67,6 @@ MQ_DELIVERY_REGISTRY_NAMESPACE ?=
 MQ_DELIVERY_REGISTRY_USER ?=
 # MQ_DELIVERY_REGISTRY_CREDENTIAL is the password/API key for the remote registry (if required)
 MQ_DELIVERY_REGISTRY_CREDENTIAL ?=
-# ARCH is the platform architecture (e.g. amd64, ppc64le or s390x)
-ARCH ?= $(if $(findstring x86_64,$(shell uname -m)),amd64,$(shell uname -m))
 # LTS is a boolean value to enable/disable LTS container build
 LTS ?= false
 # VOLUME_MOUNT_OPTIONS is used when bind-mounting files from the "downloads" directory into the container.  By default, SELinux labels are automatically re-written, but this doesn't work on some filesystems with extended attributes (xattrs).  You can turn off the label re-writing by setting this variable to be blank.
@@ -108,12 +113,17 @@ endif
 
 # Try to figure out which archive to use from the architecture
 ifeq "$(ARCH)" "amd64"
-	MQ_ARCHIVE_ARCH=X86-64
-	MQ_ARCHIVE_DEV_ARCH=X64
+	MQ_ARCHIVE_ARCH:=X86-64
+	MQ_ARCHIVE_DEV_ARCH:=X64
 else ifeq "$(ARCH)" "ppc64le"
-	MQ_ARCHIVE_ARCH=PPC64LE
+	MQ_ARCHIVE_ARCH:=PPC64LE
+	MQ_ARCHIVE_DEV_ARCH:=PPC64LE
 else ifeq "$(ARCH)" "s390x"
-	MQ_ARCHIVE_ARCH=S390X
+	MQ_ARCHIVE_ARCH:=S390X
+	MQ_ARCHIVE_DEV_ARCH:=S390X
+else ifeq "$(ARCH)" "arm64"
+	MQ_ARCHIVE_ARCH:=ARM64
+	MQ_ARCHIVE_DEV_ARCH:=ARM64
 endif
 
 # If this is a fake master build, push images to alternative location (pipeline wont consider these images GA candidates)
@@ -322,6 +332,7 @@ test-advancedserver-cover: test/docker/vendor coverage
 
 # Command to build the image
 # Args: imageName, imageTag, dockerfile, extraArgs, dockerfileTarget
+# If the ARCH variable has been changed from the default value (arch_go variable), then the `--platform` parameter is added
 define build-mq-command
 	$(COMMAND) build \
 	  --tag $1:$2 \
@@ -338,6 +349,7 @@ define build-mq-command
 	  --label vcs-ref=$(IMAGE_REVISION) \
 	  --label vcs-type=git \
 	  --label vcs-url=$(IMAGE_SOURCE) \
+	  $(if $(findstring $(arch_go),$(ARCH)),,--platform=linux/$(ARCH)) \
 	  $(EXTRA_LABELS) \
 	  --target $5 \
 	  .
@@ -439,9 +451,12 @@ build-sdk: downloads/$(MQ_ARCHIVE_DEV)
 .PHONY: log-build-env
 log-build-vars:
 	$(info $(SPACER)$(shell printf $(TITLE)"Build environment"$(END)))
-	@echo ARCH=$(ARCH)
-	@echo MQ_VERSION=$(MQ_VERSION)
-	@echo MQ_ARCHIVE=$(MQ_ARCHIVE)
+	@echo arch_uname=$(arch_uname)
+	@echo arch_go=$(arch_go)
+	@echo "ARCH=$(ARCH) (origin:$(origin ARCH))"
+	@echo MQ_VERSION="$(MQ_VERSION) (origin:$(origin MQ_VERSION))"
+	@echo MQ_ARCHIVE="$(MQ_ARCHIVE) (origin:$(origin MQ_ARCHIVE))"
+	@echo MQ_ARCHIVE_DEV_ARCH=$(MQ_ARCHIVE_DEV_ARCH)
 	@echo MQ_ARCHIVE_DEV=$(MQ_ARCHIVE_DEV)
 	@echo MQ_IMAGE_DEVSERVER=$(MQ_IMAGE_DEVSERVER)
 	@echo MQ_IMAGE_ADVANCEDSERVER=$(MQ_IMAGE_ADVANCEDSERVER)
diff --git a/authservice/mqhtpass/Makefile b/authservice/mqhtpass/Makefile
index 01939f1..82f92ba 100644
--- a/authservice/mqhtpass/Makefile
+++ b/authservice/mqhtpass/Makefile
@@ -1,4 +1,4 @@
-# © Copyright IBM Corporation 2017, 2020
+# © Copyright IBM Corporation 2017, 2022
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,9 +20,15 @@
 
 SRC_DIR = src
 BUILD_DIR = ./build
+ARCH ?= $(if $(findstring x86_64,$(shell uname -m)),amd64,$(if $(findstring aarch64,$(shell uname -m)),aarch64,$(shell uname -m)))
 
 # Flags passed to the C compiler.  Need to use gnu11 to get POSIX functions needed for file locking.
-CFLAGS += -std=gnu11 -fPIC -Wall -m64
+CFLAGS.amd64 := -m64
+CFLAGS.ppc64le := -m64
+CFLAGS.s390x := -m64
+# -m64 is not a valid compiler option on aarch64/arm64 (ARM)
+CFLAGS.arm64 :=
+CFLAGS += -std=gnu11 -fPIC -Wall ${CFLAGS.${ARCH}}
 
 LIB_APR = -L/usr/lib64 -lapr-1 -laprutil-1
 LIB_MQ = -L/opt/mqm/lib64 -lmqm_r
diff --git a/install-mq-server-prereqs.sh b/install-mq-server-prereqs.sh
index bf96f7d..c6b61eb 100644
--- a/install-mq-server-prereqs.sh
+++ b/install-mq-server-prereqs.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # -*- mode: sh -*-
-# © Copyright IBM Corporation 2015, 2021
+# © Copyright IBM Corporation 2015, 2022
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,6 +22,7 @@ test -f /usr/bin/yum && YUM=true || YUM=false
 test -f /usr/bin/microdnf && MICRODNF=true || MICRODNF=false
 test -f /usr/bin/rpm && RPM=true || RPM=false
 test -f /usr/bin/apt-get && UBUNTU=true || UBUNTU=false
+CPU_ARCH=$(uname -m)
 
 if ($UBUNTU); then
   export DEBIAN_FRONTEND=noninteractive
@@ -29,8 +30,7 @@ if ($UBUNTU); then
   # This ensures no unsupported code gets installed, and makes the build faster
   source /etc/os-release
   # Figure out the correct apt URL based on the CPU architecture
-  CPU_ARCH=$(uname -p)
-  if [ ${CPU_ARCH} == "x86_64" ]; then
+  if [ "${CPU_ARCH}" == "x86_64" ]; then
      APT_URL="http://archive.ubuntu.com/ubuntu/"
   else
      APT_URL="http://ports.ubuntu.com/ubuntu-ports/"
@@ -41,29 +41,22 @@ if ($UBUNTU); then
   echo "deb ${APT_URL} ${UBUNTU_CODENAME}-updates main restricted" >> /etc/apt/sources.list
   echo "deb ${APT_URL} ${UBUNTU_CODENAME}-security main restricted" >> /etc/apt/sources.list
   # Install additional packages required by MQ, this install process and the runtime scripts
+  EXTRA_DEBS="bash bc ca-certificates coreutils curl debianutils file findutils gawk grep libc-bin mount passwd procps sed tar util-linux"
+  # On ARM CPUs, there is no IBM JRE, so install another one
+  if [ "${CPU_ARCH}" == "aarch64" ]; then
+    EXTRA_DEBS="${EXTRA_DEBS} openjdk-8-jre"
+  fi
   apt-get update
-  apt-get install -y --no-install-recommends \
-    bash \
-    bc \
-    ca-certificates \
-    coreutils \
-    curl \
-    debianutils \
-    file \
-    findutils \
-    gawk \
-    grep \
-    libc-bin \
-    mount \
-    passwd \
-    procps \
-    sed \
-    tar \
-    util-linux 
+  apt-get install -y --no-install-recommends ${EXTRA_DEBS}
 fi
 
 if ($RPM); then
   EXTRA_RPMS="bash bc ca-certificates file findutils gawk glibc-common grep ncurses-compat-libs passwd procps-ng sed shadow-utils tar util-linux which"
+  # On ARM CPUs, there is no IBM JRE, so install another one
+  if [ "${CPU_ARCH}" == "aarch64" ]; then
+    EXTRA_RPMS="${EXTRA_RPMS} java-1.8.0-openjdk-headless"
+  fi
+
   # Install additional packages required by MQ, this install process and the runtime scripts
   $YUM && yum -y install --setopt install_weak_deps=false ${EXTRA_RPMS}
   $MICRODNF && microdnf --disableplugin=subscription-manager install ${EXTRA_RPMS}