diff --git a/apps/Arm/odroid_vm/CMakeLists.txt b/apps/Arm/odroid_vm/CMakeLists.txt
index aeab0695..13e708b2 100644
--- a/apps/Arm/odroid_vm/CMakeLists.txt
+++ b/apps/Arm/odroid_vm/CMakeLists.txt
@@ -32,8 +32,6 @@ add_subdirectory(components/spi)
 add_subdirectory(components/clk)
 add_subdirectory(components/timer)
 
-set(linux_binary_name "${CAMKES_ARM_LINUX_DIR}/linux")
-
 # Different device tree if compiling with VmVUSB
 if(VmVUSB)
     set(device_tree_src "${CAMKES_ARM_LINUX_DIR}/linux-secure-vusb-dtb")
@@ -49,14 +47,12 @@ add_custom_command(
         bash -c
         "sed \"s/root=\\/dev\\/mmcblk1p2/root=\\/dev\\/${VmRootfs}/g\" ${device_tree_src} > ${linux_dtb}"
     VERBATIM
+    DEPENDS "${device_tree_src}"
 )
-# Create custom target for setting the dtb
-add_custom_target(set_dtb DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/linux/linux-dtb")
 
-# Add Linux VM images into file server
-AddToFileServer("linux" "${linux_binary_name}")
-AddToFileServer("linux-dtb" "${CMAKE_CURRENT_BINARY_DIR}/linux/linux-dtb" DEPENDS set_dtb)
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+DefineCAmkESVMFileServer(FILES "linux:${CAMKES_ARM_LINUX_DIR}/linux" "linux-dtb:${linux_dtb}")
 
 # Declare odroid root server
 DeclareCAmkESRootserver(
diff --git a/apps/Arm/vm_cross_connector/CMakeLists.txt b/apps/Arm/vm_cross_connector/CMakeLists.txt
index 64697289..4560c29d 100644
--- a/apps/Arm/vm_cross_connector/CMakeLists.txt
+++ b/apps/Arm/vm_cross_connector/CMakeLists.txt
@@ -37,8 +37,6 @@ elseif("${KernelARMPlatform}" STREQUAL "qemu-arm-virt")
     endif()
 endif()
 
-AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux")
-
 if(BUILD_CROSSVM)
     set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/rootfs.cpio.gz")
     # Checkout and configure linux to build crossvm module
@@ -195,17 +193,16 @@ AddFileToOverlayDir(
     overlay
 )
 
-# Construct new rootfs
+# Construct new rootfs.
 AddOverlayDirToRootfs(
     overlay
     ${rootfs_file}
     "buildroot"
     "rootfs_install"
     output_overlayed_rootfs_location
-    rootfs_target
+    rootfs_target # helper CMake target to be created, not used
     GZIP
 )
-AddToFileServer("linux-initrd" ${output_overlayed_rootfs_location} DEPENDS rootfs_target)
 
 AddCamkesCPPFlag(
     cpp_flags
@@ -218,7 +215,14 @@ AddCamkesCPPFlag(
     VmVirtioNetVirtqueue
 )
 
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'rootfs_target'.
+DefineCAmkESVMFileServer(
+    FILES "linux:${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux"
+    "linux-initrd:${output_overlayed_rootfs_location}"
+)
 
 CAmkESAddImportPath(${KernelARMPlatform})
 
diff --git a/apps/Arm/vm_introspect/CMakeLists.txt b/apps/Arm/vm_introspect/CMakeLists.txt
index 8db76bbf..fecb68a6 100644
--- a/apps/Arm/vm_introspect/CMakeLists.txt
+++ b/apps/Arm/vm_introspect/CMakeLists.txt
@@ -54,8 +54,6 @@ elseif("${KernelARMPlatform}" STREQUAL "qemu-arm-virt")
 
 endif()
 
-AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux")
-
 set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/rootfs_crossvm.cpio.gz")
 
 ExternalProject_Add(
@@ -104,11 +102,18 @@ AddOverlayDirToRootfs(
     "buildroot"
     "rootfs_install"
     output_overlayed_rootfs_location
-    rootfs_target
+    rootfs_target # helper CMake target to be created, not used
     GZIP
 )
 
-AddToFileServer("linux-initrd" ${output_overlayed_rootfs_location} DEPENDS rootfs_target)
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'rootfs_target'.
+DefineCAmkESVMFileServer(
+    FILES "linux:${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux"
+    "linux-initrd:${output_overlayed_rootfs_location}"
+)
 
 AddCamkesCPPFlag(
     cpp_flags
@@ -121,8 +126,6 @@ AddCamkesCPPFlag(
     VmVirtioNetVirtqueue
 )
 
-DefineCAmkESVMFileServer()
-
 CAmkESAddImportPath(${KernelARMPlatform})
 
 # Define our VM Component with out cross vm dataports glue code
diff --git a/apps/Arm/vm_minimal/CMakeLists.txt b/apps/Arm/vm_minimal/CMakeLists.txt
index 196c0673..7ef619fd 100644
--- a/apps/Arm/vm_minimal/CMakeLists.txt
+++ b/apps/Arm/vm_minimal/CMakeLists.txt
@@ -12,6 +12,10 @@ include(${CAMKES_ARM_VM_HELPERS_PATH})
 
 set(cpp_includes "${CAMKES_VM_DIR}/components/VM_Arm")
 
+# On some platforms, there is no dedicated rootfs, because it's part of the
+# Linux kernel image.
+set(rootfs_file "")
+
 # Create our CPP Flags based on ARM VM config variables
 if("${KernelARMPlatform}" STREQUAL "tk1")
     set(cpp_flags "-DKERNELARMPLATFORM_TK1")
@@ -23,10 +27,11 @@ if("${KernelARMPlatform}" STREQUAL "tk1")
         set(device_tree_src "${CAMKES_ARM_LINUX_DIR}/linux-tk1-secure.dts")
     endif()
 
+    # kernel image contains rootfs
     if(VmTk1InitrdRootfs)
-        set(linux_binary_name "${CAMKES_ARM_LINUX_DIR}/linux-tk1-initrd")
+        set(linux_image "${CAMKES_ARM_LINUX_DIR}/linux-tk1-initrd")
     else()
-        set(linux_binary_name "${CAMKES_ARM_LINUX_DIR}/linux-tk1-debian")
+        set(linux_image "${CAMKES_ARM_LINUX_DIR}/linux-tk1-debian")
     endif()
 
     set(dtb_file "${CMAKE_CURRENT_BINARY_DIR}/linux/linux-dtb")
@@ -37,73 +42,65 @@ if("${KernelARMPlatform}" STREQUAL "tk1")
         VERBATIM
         DEPENDS ${device_tree_src}
     )
-    # Create custom target for setting the dtb
-    add_custom_target(set_dtb DEPENDS "${dtb_file}")
-
-    # Add Linux VM images into file server
-    AddToFileServer("linux" "${linux_binary_name}")
-    AddToFileServer("linux-dtb" "${dtb_file}" DEPENDS set_dtb)
+    # There is no need to create an explicit target there, any step that uses
+    # 'dtb_file' and lists it properly as dependency will make CMake run the
+    # command above to create (or update) it.
 
 elseif("${KernelARMPlatform}" STREQUAL "tx1")
     set(cpp_flags "-DKERNELARMPLATFORM_TX1")
 
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/tx1/linux")
-    AddToFileServer("linux-dtb" "${CAMKES_VM_IMAGES_DIR}/tx1/linux-dtb")
+    # kernel image contains rootfs
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/tx1/linux")
+    set(dtb_file "${CAMKES_VM_IMAGES_DIR}/tx1/linux-dtb")
 
 elseif("${KernelARMPlatform}" STREQUAL "exynos5422")
     find_package(camkes-vm-linux REQUIRED)
     include(${CAMKES_VM_LINUX_HELPERS_PATH})
     set(cpp_flags "-DKERNELARMPLATFORM_EXYNOS5422")
 
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/exynos5422/linux")
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/exynos5422/linux")
     # Generate overlayed rootfs
     set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/exynos5422/rootfs.cpio.gz")
-    AddToFileServer("linux-initrd" ${rootfs_file})
     # Updated dtb based on initrd
     UpdateDtbFromInitrd(
         "${CAMKES_VM_IMAGES_DIR}/exynos5422/linux-dtb"
         ${rootfs_file}
         "0x4d700000"
-        dtb_gen_target
-        output_dtb_location
+        dtb_gen_target # helper CMake target to be created, not used
+        dtb_file
     )
-    AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
 
 elseif("${KernelARMPlatform}" STREQUAL "tx2")
     find_package(camkes-vm-linux REQUIRED)
     include(${CAMKES_VM_LINUX_HELPERS_PATH})
     set(cpp_flags "-DKERNELARMPLATFORM_TX2")
 
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/tx2/linux")
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/tx2/linux")
     set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/tx2/rootfs.cpio.gz")
-    AddToFileServer("linux-initrd" ${rootfs_file})
     # Updated dtb based on initrd
     UpdateDtbFromInitrd(
         "${CAMKES_VM_IMAGES_DIR}/tx2/linux-dtb"
         ${rootfs_file}
         "0xf7000000"
-        dtb_gen_target
-        output_dtb_location
+        dtb_gen_target # helper CMake target to be created, not used
+        dtb_file
     )
-    AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
 
 elseif("${KernelARMPlatform}" STREQUAL "qemu-arm-virt")
     find_package(camkes-vm-linux REQUIRED)
     include(${CAMKES_VM_LINUX_HELPERS_PATH})
     set(cpp_flags "-DKERNELARMPLATFORM_QEMU-ARM-VIRT")
 
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/qemu-arm-virt/linux")
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/qemu-arm-virt/linux")
     set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/qemu-arm-virt/rootfs.cpio.gz")
-    AddToFileServer("linux-initrd" ${rootfs_file})
     # Updated dtb based on initrd
     UpdateDtbFromInitrd(
         "${CAMKES_VM_IMAGES_DIR}/qemu-arm-virt/linux-dtb"
         ${rootfs_file}
         "0x4d700000"
-        dtb_gen_target
-        output_dtb_location
+        dtb_gen_target # helper CMake target to be created, not used
+        dtb_file
     )
-    AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
     include(simulation)
     set(SIMULATION ON CACHE BOOL "Generate simulation script to run qemu with the proper arguments")
     if(SIMULATION)
@@ -119,19 +116,16 @@ elseif("${KernelARMPlatform}" STREQUAL "odroidc2")
         CAMKES_ROOT_DTB_FILE_PATH "${CAMKES_VM_IMAGES_DIR}/odroidc2/camkes-linux-dtb"
         CACHE STRING ""
     )
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/odroidc2/linux")
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/odroidc2/linux")
     set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/odroidc2/rootfs.cpio.gz")
-    AddToFileServer("linux-initrd" ${rootfs_file})
     # Updated dtb based on initrd
     UpdateDtbFromInitrd(
         "${CAMKES_VM_IMAGES_DIR}/odroidc2/linux-dtb"
         ${rootfs_file}
         "0x2d700000"
-        dtb_gen_target
-        output_dtb_location
+        dtb_gen_target # helper CMake target to be created, not used
+        dtb_file
     )
-    AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
-
 elseif("${KernelARMPlatform}" STREQUAL "zcu102")
 
     if("${VmZynqmpPetalinuxVersion}" STREQUAL "")
@@ -141,9 +135,9 @@ elseif("${KernelARMPlatform}" STREQUAL "zcu102")
         )
     endif()
 
-    AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/zynqmp/${VmZynqmpPetalinuxVersion}/linux")
-    AddToFileServer(
-        "linux-initrd"
+    set(linux_image "${CAMKES_VM_IMAGES_DIR}/zynqmp/${VmZynqmpPetalinuxVersion}/linux")
+    set(
+        rootfs_file
         "${CAMKES_VM_IMAGES_DIR}/zynqmp/${VmZynqmpPetalinuxVersion}/rootfs-minimal.cpio.gz"
     )
 
@@ -156,17 +150,25 @@ elseif("${KernelARMPlatform}" STREQUAL "zcu102")
         VERBATIM
         DEPENDS ${dts_file}
     )
-
-    # Create custom target for setting the dtb
-    add_custom_target(set_dtb DEPENDS "${dtb_file}")
-    AddToFileServer("linux-dtb" "${dtb_file}" DEPENDS set_dtb)
+    # There is no need to create an explicit target there, any step that uses
+    # 'dtb_file' and lists it properly as dependency will make CMake run the
+    # command above to create (or update) it.
 
     list(APPEND cpp_includes "${CAMKES_VM_DIR}/components/VM_Arm/plat_include/zynqmp")
 endif()
 
 AddCamkesCPPFlag(cpp_flags CONFIG_VARS VmEmmc2NoDMA VmVUSB Tk1DeviceFwd Tk1Insecure)
 
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'dtb_gen_target'
+set(cpio_files "linux:${linux_image}" "linux-dtb:${dtb_file}")
+if(rootfs_file)
+    list(APPEND cpio_files "linux-initrd:${rootfs_file}")
+endif()
+
+DefineCAmkESVMFileServer(FILES ${cpio_files})
 
 CAmkESAddImportPath(${KernelARMPlatform})
 
diff --git a/apps/Arm/vm_multi/CMakeLists.txt b/apps/Arm/vm_multi/CMakeLists.txt
index 26456ece..ab0b0d06 100644
--- a/apps/Arm/vm_multi/CMakeLists.txt
+++ b/apps/Arm/vm_multi/CMakeLists.txt
@@ -46,7 +46,7 @@ AddOverlayDirToRootfs(
     "buildroot"
     "rootfs_install"
     vm0_output_overlayed_rootfs_location
-    rootfs_target_vm0
+    rootfs_target_vm0 # helper CMake target to be created, not used
     GZIP
 )
 
@@ -69,28 +69,22 @@ AddOverlayDirToRootfs(
     "buildroot"
     "rootfs_install"
     client_output_overlayed_rootfs_location
-    rootfs_target_client_vm
+    rootfs_target_client_vm # helper CMake target to be created, not used
     GZIP
 )
 
-AddToFileServer(
-    "linux-initrd-vm0"
-    "${vm0_output_overlayed_rootfs_location}"
-    DEPENDS
-    rootfs_target_vm0
-)
-AddToFileServer(
-    "linux-initrd-vm-client"
-    "${client_output_overlayed_rootfs_location}"
-    DEPENDS
-    rootfs_target_client_vm
-)
-
-AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux")
-
 AddCamkesCPPFlag(cpp_flags CONFIG_VARS VmEmmc2NoDMA VmVUSB VmVchan Tk1DeviceFwd Tk1Insecure)
 
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper targets
+# 'rootfs_target_vm0' and 'rootfs_target_client_vm'
+DefineCAmkESVMFileServer(
+    FILES
+    "linux-initrd-vm0:${vm0_output_overlayed_rootfs_location}"
+    "linux-initrd-vm-client:${client_output_overlayed_rootfs_location}"
+    "linux:${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux"
+)
 
 CAmkESAddImportPath(${KernelARMPlatform})
 
diff --git a/apps/Arm/vm_serial_server/CMakeLists.txt b/apps/Arm/vm_serial_server/CMakeLists.txt
index 1547aef0..df72cced 100644
--- a/apps/Arm/vm_serial_server/CMakeLists.txt
+++ b/apps/Arm/vm_serial_server/CMakeLists.txt
@@ -16,7 +16,6 @@ include(${CAMKES_VM_LINUX_HELPERS_PATH})
 # Create our CPP Flags based on ARM VM config variables
 set(cpp_flags "-DKERNELARMPLATFORM_EXYNOS5422")
 
-AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/exynos5422/linux")
 # Generate overlayed rootfs
 set(rootfs_file "${CAMKES_VM_IMAGES_DIR}/exynos5422/rootfs.cpio.gz")
 AddFileToOverlayDir(
@@ -32,25 +31,31 @@ AddOverlayDirToRootfs(
     "buildroot"
     "rootfs_install"
     output_overlayed_rootfs_location
-    rootfs_target
+    rootfs_target # helper CMake target to be created, not used
     GZIP
 )
-AddToFileServer("linux-initrd" ${output_overlayed_rootfs_location} DEPENDS rootfs_target)
+
 # Updated dtb based on generated initrd
 UpdateDtbFromInitrd(
     "${CAMKES_VM_IMAGES_DIR}/exynos5422/linux-dtb-virtcon"
     ${output_overlayed_rootfs_location}
     "0x4d700000"
-    dtb_gen_target
+    dtb_gen_target # helper CMake target to be created, not used
     output_dtb_location
-    DEPENDS
-    rootfs_target
 )
-AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
 
 AddCamkesCPPFlag(cpp_flags CONFIG_VARS VmEmmc2NoDMA VmVUSB Tk1DeviceFwd Tk1Insecure)
 
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper targets
+# 'rootfs_target' and 'dtb_gen_target'
+DefineCAmkESVMFileServer(
+    FILES
+    "linux:${CAMKES_VM_IMAGES_DIR}/exynos5422/linux"
+    "linux-initrd:${output_overlayed_rootfs_location}"
+    "linux-dtb:${output_dtb_location}"
+)
 
 CAmkESAddImportPath(exynos5422)
 
diff --git a/apps/Arm/vm_virtio_net/CMakeLists.txt b/apps/Arm/vm_virtio_net/CMakeLists.txt
index 77fca436..6afd3656 100644
--- a/apps/Arm/vm_virtio_net/CMakeLists.txt
+++ b/apps/Arm/vm_virtio_net/CMakeLists.txt
@@ -58,25 +58,20 @@ AddOverlayDirToRootfs(
     "buildroot"
     "rootfs_install"
     output_overlayed_rootfs_location
-    rootfs_target
+    rootfs_target # helper CMake target to be created, not used
     GZIP
 )
 
-# Updated dtb based on generated initrd
+# Updated dtb based on generated initrd. 'output_overlayed_rootfs_location' is
+# taken as input, there there is an implicit dependency  This implicitly depends on
 UpdateDtbFromInitrd(
     ${dtb_file}
     ${output_overlayed_rootfs_location}
     ${rootfs_address}
-    dtb_gen_target
+    dtb_gen_target # helper CMake target to be created, not used
     output_dtb_location
-    DEPENDS
-    rootfs_target
 )
 
-AddToFileServer("linux-dtb" "${output_dtb_location}" DEPENDS dtb_gen_target)
-AddToFileServer("linux-initrd" ${output_overlayed_rootfs_location} DEPENDS rootfs_target)
-AddToFileServer("linux" "${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux")
-
 AddCamkesCPPFlag(
     cpp_flags
     CONFIG_VARS
@@ -87,7 +82,16 @@ AddCamkesCPPFlag(
     VmVirtioNetVirtqueue
 )
 
-DefineCAmkESVMFileServer()
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper targets
+# 'rootfs_target' or 'dtb_gen_target'
+DefineCAmkESVMFileServer(
+    FILES
+    "linux:${CAMKES_VM_IMAGES_DIR}/${KernelARMPlatform}/linux"
+    "linux-initrd:${output_overlayed_rootfs_location}"
+    "linux-dtb:${output_dtb_location}"
+)
 
 CAmkESAddImportPath(${KernelARMPlatform})
 
diff --git a/apps/x86/cma34cr_centos/CMakeLists.txt b/apps/x86/cma34cr_centos/CMakeLists.txt
index 4c389037..e6e9a67f 100644
--- a/apps/x86/cma34cr_centos/CMakeLists.txt
+++ b/apps/x86/cma34cr_centos/CMakeLists.txt
@@ -18,21 +18,28 @@ DeclareCAmkESVM(Init0 EXTRA_SOURCES ${init0_extra} EXTRA_LIBS ethdrivers)
 
 # Declare C162 Kernel
 DecompressLinuxKernel(
-    decompress_linux decompressed_kernel ${CMAKE_CURRENT_SOURCE_DIR}/centos_linux/bzimage
+    decompress_linux # helper CMake target to be created, not used
+    decompressed_kernel
+    ${CMAKE_CURRENT_SOURCE_DIR}/centos_linux/bzimage
 )
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS decompress_linux)
-
-# Declare C162 Rootfs
-AddToFileServer("rootfs.cpio" ${CMAKE_CURRENT_SOURCE_DIR}/centos_linux/rootfs.cpio)
 
 # Provided by find_package(util_libs)
 include(${LWIP_HELPERS})
 # Declare lwipopts.h include
 AddLWIPConfiguration(${CMAKE_CURRENT_SOURCE_DIR}/lwip_include)
 
-# Initialise CAmkES Root Server with addition CPP includes
-DeclareCAmkESVMRootServer(
-    cma34cr_centos.camkes
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'decompress_linux'.
+DefineCAmkESVMFileServer(
+    FILES "bzimage:${decompressed_kernel}"
+    "rootfs.cpio:${CMAKE_CURRENT_SOURCE_DIR}/centos_linux/rootfs.cpio"
+)
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver(
+    "cma34cr_centos.camkes"
     CPP_INCLUDES
     ${CAMKES_VM_DIR}/components/StringReverse/include
     ${CAMKES_VM_DIR}/components/Ethdriver/include
diff --git a/apps/x86/cma34cr_ubuntu/CMakeLists.txt b/apps/x86/cma34cr_ubuntu/CMakeLists.txt
index 84855785..44c22076 100644
--- a/apps/x86/cma34cr_ubuntu/CMakeLists.txt
+++ b/apps/x86/cma34cr_ubuntu/CMakeLists.txt
@@ -20,11 +20,20 @@ DeclareCAmkESVM(Init0)
 
 # Declare C162 Kernel
 GetArchSpecificLinuxKernelFile("32" kernel_file)
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
-
-# Declare C162 Rootfs
-AddToFileServer("rootfs.cpio" ${CMAKE_CURRENT_SOURCE_DIR}/ubuntu_linux/rootfs.cpio)
-
-# Initialise CAmkES Root Server with addition CPP includes
-DeclareCAmkESVMRootServer(cma34cr_ubuntu.camkes)
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
+
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'extract_linux_kernel'.
+DefineCAmkESVMFileServer(
+    FILES "bzimage:${decompressed_kernel}"
+    "rootfs.cpio:${CMAKE_CURRENT_SOURCE_DIR}/ubuntu_linux/rootfs.cpio"
+)
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver("cma34cr_centos.camkes")
diff --git a/apps/x86/minimal/CMakeLists.txt b/apps/x86/minimal/CMakeLists.txt
index 6888adc4..0f0254b3 100644
--- a/apps/x86/minimal/CMakeLists.txt
+++ b/apps/x86/minimal/CMakeLists.txt
@@ -24,14 +24,20 @@ GetDefaultLinuxKernelFile(kernel_file)
 GetDefaultLinuxRootfsFile(rootfs_file)
 
 # Decompress Linux Kernel image and add to file server
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
-
-# Add rootfs images into file server
-AddToFileServer("rootfs.cpio" ${rootfs_file})
-
-# Initialise CAmkES Root Server with addition CPP includes
-DeclareCAmkESVMRootServer(minimal.camkes)
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
+
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'extract_linux_kernel'.
+DefineCAmkESVMFileServer(FILES "bzimage:${decompressed_kernel}" "rootfs.cpio:${rootfs_file}")
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver("minimal.camkes" CPP_INCLUDES "${VM_PROJECT_DIR}/components/VM")
 
 if(SIMULATION)
     include(simulation)
diff --git a/apps/x86/minimal_64/CMakeLists.txt b/apps/x86/minimal_64/CMakeLists.txt
index d4d1a1f8..91274b67 100644
--- a/apps/x86/minimal_64/CMakeLists.txt
+++ b/apps/x86/minimal_64/CMakeLists.txt
@@ -21,14 +21,20 @@ GetDefaultLinuxKernelFile(kernel_file)
 GetDefaultLinuxRootfsFile(rootfs_file)
 
 # Decompress Linux Kernel image and add to file server
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
-
-# Add rootfs images into file server
-AddToFileServer("rootfs.cpio" ${rootfs_file})
-
-# Initialise CAmkES Root Server with addition CPP includes
-DeclareCAmkESVMRootServer(minimal.camkes)
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
+
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'extract_linux_kernel'.
+DefineCAmkESVMFileServer(FILES "bzimage:${decompressed_kernel}" "rootfs.cpio:${rootfs_file}")
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver("minimal.camkes" CPP_INCLUDES "${VM_PROJECT_DIR}/components/VM")
 
 if(SIMULATION)
     include(simulation)
diff --git a/apps/x86/optiplex9020/CMakeLists.txt b/apps/x86/optiplex9020/CMakeLists.txt
index 8ae43a20..1b21b293 100644
--- a/apps/x86/optiplex9020/CMakeLists.txt
+++ b/apps/x86/optiplex9020/CMakeLists.txt
@@ -25,13 +25,22 @@ GetArchDefaultLinuxKernelFile("32" kernel_file)
 GetArchDefaultLinuxRootfsFile("32" rootfs_file)
 
 # Decompress Linux Kernel image
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-
-# Add Linux VM images into file server
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
-AddToFileServer("rootfs.cpio" ${rootfs_file})
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
 
-# Initialise CAmkES Root Server with additional CPP includes
-DeclareCAmkESVMRootServer(
-    optiplex9020.camkes CPP_INCLUDES ${CAMKES_VM_DIR}/components/StringReverse/include
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'extract_linux_kernel'.
+DefineCAmkESVMFileServer(FILES "bzimage:${decompressed_kernel}" "rootfs.cpio:${rootfs_file}")
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver(
+    "optiplex9020.camkes"
+    CPP_INCLUDES
+    "${VM_PROJECT_DIR}/components/VM"
+    "${CAMKES_VM_DIR}/components/StringReverse/include"
 )
diff --git a/apps/x86/virtio_blk_sample/CMakeLists.txt b/apps/x86/virtio_blk_sample/CMakeLists.txt
index e6160dcd..f6f6cd76 100644
--- a/apps/x86/virtio_blk_sample/CMakeLists.txt
+++ b/apps/x86/virtio_blk_sample/CMakeLists.txt
@@ -21,12 +21,20 @@ GetDefaultLinuxKernelFile(kernel_file)
 GetDefaultLinuxRootfsFile(rootfs_file)
 
 # Decompress Linux Kernel image and add to file server
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
-
-AddToFileServer("rootfs.cpio" ${rootfs_file})
-
-DeclareCAmkESVMRootServer(virtio_blk_sample.camkes)
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
+
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper target
+# 'extract_linux_kernel'.
+DefineCAmkESVMFileServer(FILES "bzimage:${decompressed_kernel}" "rootfs.cpio:${rootfs_file}")
+
+# Declare CAmkES Root Server
+DeclareCAmkESRootserver("virtio_blk_sample.camkes")
 
 if(SIMULATION)
     include(simulation)
diff --git a/apps/x86/zmq_samples/CMakeLists.txt b/apps/x86/zmq_samples/CMakeLists.txt
index f8d80204..4b35e913 100644
--- a/apps/x86/zmq_samples/CMakeLists.txt
+++ b/apps/x86/zmq_samples/CMakeLists.txt
@@ -135,6 +135,8 @@ AddZMQBinary(worker)
 AddZMQBinary(pub)
 AddZMQBinary(sub)
 
+set(rootfs_images "")
+
 foreach(i RANGE ${NumberVMsLess1})
     set(overlay_target "overlay_vm${i}")
     set(rootfs_target "rootfs_target_vm${i}")
@@ -153,14 +155,23 @@ foreach(i RANGE ${NumberVMsLess1})
         "buildroot"
         "rootfs_install"
         rootfs_img
-        "${rootfs_target}"
+        "${rootfs_target}" # helper CMake target to be created, not used
     )
-    AddToFileServer("vm${i}_rootfs.cpio" "${rootfs_img}" DEPENDS "${rootfs_target}")
+    list(APPEND rootfs_images "vm${i}_rootfs.cpio:${rootfs_img}")
 endforeach()
 
 # Decompress Linux Kernel image and add to file server
-DecompressLinuxKernel(extract_linux_kernel decompressed_kernel ${kernel_file})
-AddToFileServer("bzimage" ${decompressed_kernel} DEPENDS extract_linux_kernel)
+DecompressLinuxKernel(
+    extract_linux_kernel # helper CMake target to be created, not used
+    decompressed_kernel
+    ${kernel_file}
+)
+
+# Create file server with VM images. There is an implicit dependency on the
+# input files, so the rules above will be invoked to generate/update the files.
+# There is no need to specify an explicit dependency on the helper targets
+# 'extract_linux_kernel' and each '${rootfs_target}'
+DefineCAmkESVMFileServer(FILES "bzimage:${decompressed_kernel}" "${rootfs_images}")
 
 # Initialise CAmkES Root Server with addition CPP includes
-DeclareCAmkESVMRootServer("${zmq_camkes}")
+DeclareCAmkESRootserver("${zmq_camkes}" CPP_INCLUDES "${VM_PROJECT_DIR}/components/VM")