diff --git a/board/pc/genimage-efi.cfg b/board/pc/genimage-efi.cfg
deleted file mode 100644
index ec96d73dd1..0000000000
--- a/board/pc/genimage-efi.cfg
+++ /dev/null
@@ -1,31 +0,0 @@
-image efi-part.vfat {
-  vfat {
-    file startup.nsh {
-      image = "efi-part/startup.nsh"
-    }
-    file EFI {
-      image = "efi-part/EFI"
-    }
-    file bzImage {
-      image = "bzImage"
-    }
-  }
-  size = 16M
-}
-
-image disk.img {
-
-  hdimage {
-  }
-
-  partition boot {
-    partition-type = 0xEF
-    image = "efi-part.vfat"
-  }
-
-  partition root {
-    partition-type = 0x83
-    image = "rootfs.ext2"
-  }
-
-}
diff --git a/board/pc/post-build.sh b/board/pc/post-build.sh
index 552d488160..346f29ab6a 100755
--- a/board/pc/post-build.sh
+++ b/board/pc/post-build.sh
@@ -4,12 +4,7 @@ set -e
 
 BOARD_DIR=$(dirname "$0")
 
-# Detect boot strategy, EFI or BIOS
-if [ -f "$BINARIES_DIR/efi-part/startup.nsh" ]; then
-    cp -f "$BOARD_DIR/grub-efi.cfg" "$BINARIES_DIR/efi-part/EFI/BOOT/grub.cfg"
-else
-    cp -f "$BOARD_DIR/grub-bios.cfg" "$TARGET_DIR/boot/grub/grub.cfg"
+cp -f "$BOARD_DIR/grub-bios.cfg" "$TARGET_DIR/boot/grub/grub.cfg"
 
-    # Copy grub 1st stage to binaries, required for genimage
-    cp -f "$HOST_DIR/lib/grub/i387-pc/boot.img" "$BINARIES_DIR"
-fi
+# Copy grub 1st stage to binaries, required for genimage
+cp -f "$HOST_DIR/lib/grub/i387-pc/boot.img" "$BINARIES_DIR"
diff --git a/board/pc/post-image-efi-gpt.sh b/board/pc/post-image-efi-gpt.sh
new file mode 100755
index 0000000000..d2acd8f852
--- /dev/null
+++ b/board/pc/post-image-efi-gpt.sh
@@ -0,0 +1,62 @@
+#!/bin/sh
+
+set -e
+
+cd ${BINARIES_DIR}
+
+# GPT partition type UUIDs
+esp_type=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
+linux_type=44479540-f297-41b2-9af7-d131d5f0458a
+
+# Partition UUIDs
+efi_part_uuid=$(uuidgen)
+root_part_uuid=$(uuidgen)
+
+# Boot partition offset and size, in 512-byte sectors
+efi_part_start=64
+efi_part_size=32768
+
+# Rootfs partition offset and size, in 512-byte sectors
+root_part_start=$(( efi_part_start + efi_part_size ))
+root_part_size=$(( $(stat -c %s rootfs.ext2) / 512 ))
+
+first_lba=34
+last_lba=$(( root_part_start + root_part_size ))
+
+# Disk image size in 512-byte sectors
+image_size=$(( last_lba + first_lba ))
+
+cat > efi-part/EFI/BOOT/grub.cfg <<EOF
+set default="0"
+set timeout="5"
+
+menuentry "Buildroot" {
+	linux /bzImage root=PARTUUID=$root_part_uuid rootwait console=tty1
+}
+EOF
+
+# Create EFI system partition
+rm -f efi-part.vfat
+dd if=/dev/zero of=efi-part.vfat bs=512 count=0 seek=$efi_part_size
+mkdosfs  efi-part.vfat
+mcopy -bsp -i efi-part.vfat efi-part/startup.nsh ::startup.nsh
+mcopy -bsp -i efi-part.vfat efi-part/EFI ::EFI
+mcopy -bsp -i efi-part.vfat bzImage ::bzImage
+
+rm -f disk.img
+dd if=/dev/zero of=disk.img bs=512 count=0 seek=$image_size
+
+sfdisk disk.img <<EOF
+label: gpt
+label-id: $(uuidgen)
+device: /dev/foobar0
+unit: sectors
+first-lba: $first_lba
+last-lba: $last_lba
+
+/dev/foobar0p1 : start=$efi_part_start,  size=$efi_part_size,  type=$esp_type,   uuid=$efi_part_uuid,  name="efi-part.vfat"
+/dev/foobar0p2 : start=$root_part_start, size=$root_part_size, type=$linux_type, uuid=$root_part_uuid, name="rootfs.ext2"
+EOF
+
+dd if=efi-part.vfat of=disk.img bs=512 count=$efi_part_size seek=$efi_part_start conv=notrunc
+dd if=rootfs.ext2   of=disk.img bs=512 count=$root_part_size seek=$root_part_start conv=notrunc
diff --git a/board/pc/readme.txt b/board/pc/readme.txt
index ca3b5123c1..895331b0af 100644
--- a/board/pc/readme.txt
+++ b/board/pc/readme.txt
@@ -9,7 +9,7 @@ Bare PC sample config
 
   $ make pc_x86_64_bios_defconfig
 
-  Or for EFI:
+  For EFI-based boot strategy on a GPT-partitioned disk:
 
   $ make pc_x86_64_efi_defconfig
 
diff --git a/configs/pc_x86_64_efi_defconfig b/configs/pc_x86_64_efi_defconfig
index bba04c8f5d..324de35dff 100644
--- a/configs/pc_x86_64_efi_defconfig
+++ b/configs/pc_x86_64_efi_defconfig
@@ -10,7 +10,6 @@ BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
 
 # Required tools to create bootable media
 BR2_PACKAGE_HOST_DOSFSTOOLS=y
-BR2_PACKAGE_HOST_GENIMAGE=y
 BR2_PACKAGE_HOST_MTOOLS=y
 
 # Bootloader
@@ -22,9 +21,7 @@ BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
 # BR2_TARGET_ROOTFS_TAR is not set
-BR2_ROOTFS_POST_BUILD_SCRIPT="board/pc/post-build.sh"
-BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/pc/genimage-efi.cfg"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/pc/post-image-efi-gpt.sh"
 
 # Linux headers same as kernel, a 4.18 series
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_18=y