diff --git a/include/chromebook.sh b/include/chromebook.sh
new file mode 100644
index 00000000..0261e149
--- /dev/null
+++ b/include/chromebook.sh
@@ -0,0 +1,136 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Copyright (c) 2025 Leah Rowe <leah@libreboot.org>
+
+# Assimilate MrChromebox coreboot distro, adapting its ports
+# for use in the Libreboot build system. This will create a
+# *patch* file for Libreboot, from the current lbmk commit.
+
+# These functions are used with the "./mk mrchromebox" command.
+# MrChromebox has a habit of using branches per project, each
+# branch being a given release. He does his changes on top of
+# upstream and goes from there.
+
+# The coreboot build system (upstream one) already integrates
+# MrChromebox edk2 quite heavily, so Mrchromebox's own project
+# doesn't need a complicated external build system like lbmk.
+# He relies on pre-baked configs, that he provides, and uses
+# these to build the machines.
+
+spdx="# SPDX-License-Identifier: GPL-3.0-or-later"
+
+mr_tmprepos="" # dir to clone tmp repos in
+
+# we will use the upstream edk2 repo, but create trees
+# for mrchromebox's patches. this is because i will be
+# using edk2 for other projects in the future
+# NOTE: these mirror https://github.com/tianocore/edk2.git 
+mx_edk2gitconf="config/git/edk2/pkg.git"
+mx_edk2repo="https://codeberg.org/libreboot/edk2"
+mx_edk2repo_bkup="https://git.disroot.org/libreboot/edk2"
+
+# Now the repos to import. Please note:
+# These won't be used directly in xbmk. They're being used
+# to pull patches and configs from, that mrchromebox uses.
+# "rev" is the rev from mrchromebox. "revbase" is the upstream
+# rev that his patches derive from.
+# so we format-patch from there to HEAD(=e.g. mr_cbrev)
+
+# NOTE: upstream for our purposes: https://review.coreboot.org/coreboot
+mr_cbrepo="https://github.com/mrchromebox/coreboot"
+mr_cbbranch="MrChromebox-2503" # branch in mrchromebox
+mr_cbrev="ecd9fa6a177e00132ec214252a2b9cebbb01e25f" # relative to base
+mr_cbrevbase="38f5f7c48024d9fca4b6bbd88914423c34da709c" # 25.03 upstream base
+mr_cbtree="chromebook" # tree name in xbmk
+
+# NOTE: upstream for our purposes: https://github.com/tianocore/edk2.git
+mr_edk2repo="https:/github.com/mrchromebox/edk2"
+mr_edk2branch="uefipayload_2502" # branch in mrchromebox
+mr_edk2rev="feaf6b976b7cc72a18ed364f273751c943a9e7d0" # relative to base
+mr_edk2revbase="fbe0805b2091393406952e84724188f8c1941837" # 2025.02 upstream
+mr_edk2tree="chromebook" # tree name in xbmk
+
+# mxlibreboot was here
+prep_mr_import()
+{
+	prep_mx_edk2conf
+
+	prep_mr_target
+}
+
+# create config/git/edk2/pkg.cfg
+prep_mx_edk2conf()
+{
+	x_ remkdir "${mx_edk2gitconf%/*}"
+
+	printf "%s\n\n" "$spdx" > "$mx_edk2gitconf" \
+	    err "Can't write SPDX to '$mx_edk2gitconf'" prep_mr_edk2conf "$@"
+
+	printf "rev=\"HEAD\"\n\n" >> "$mx_edk2gitconf" \
+	    err "Can't write HEAD to '$mx_edk2gitconf'" prep_mr_edk2conf "$@"
+
+	printf "url=\"%s\"\n\n" "$mx_edk2repo" >> "$mx_edk2gitconf" \
+	    err "Can't write repo to '$mx_edk2gitconf'" prep_mr_edk2conf "$@"
+
+	printf "url=\"%s\"\n\n" "$mx_edk2repo_bkup" >> "$mx_edk2gitconf" \
+	    err "Can't write bkup to '$mx_edk2gitconf'" prep_mr_edk2conf "$@"
+}
+
+# prep config/PROJECT/TREE/ for various projects
+prep_mr_target()
+{
+	mr_tmprepos="`mktemp -d || err "can't make mrtmpdir"`" || \
+	    err "can't make mrtmpdir" "prep_mr_coreboot" "$@"
+	x_ remkdir "$mr_tmprepos"
+
+	prep_mr "coreboot" "$mr_cbrepo" "$mr_cbbranch" "$mr_cbrev" \
+	    "$mr_cbrevbase" "$mr_cbtree"
+	prep_mr "edk2" "$mr_edk2repo" "$mr_edk2branch" "$mr_edk2rev" \
+	    "$mr_edk2revbase" "$mr_edk2tree"
+}
+
+# create config/PROJECT/TREE/target.cfg
+# and config/PROJECT/TREE/patches/
+prep_mr()
+{
+	mr_projectname="$1"
+	mr_repo="$2"
+	mr_branch="$3"
+	mr_rev="$4"
+	mr_revbase="$5"
+	mr_tree="$6"
+
+	mr_tmpclone="$mr_tmprepos/$mr_projectname"
+	mr_patchdir="config/$mr_projectname/$mr_tree/patches"
+
+	x_ git clone "$mr_repo" "$mr_tmpclone"
+	x_ git -C "$mr_tmpclone" checkout "$mr_branch"
+	x_ git -C "$mr_tmpclone" reset --hard "$mr_rev"
+	x_ git -C "$mr_tmpclone" format-patch $mr_revbase..HEAD
+
+	x_ remkdir "$mr_patchdir"
+	x_ mv "$mr_tmpclone"/*.patch "$mr_patchdir"
+
+	# if no patches were created, rmdir will succeed
+	rmdir "$mr_patchdir" 1>/dev/null 2>/dev/null || :
+
+	x_ prep_mr_targetconf "$@"
+
+	x_ rm -Rf "$mr_tmpclone"
+}
+
+prep_mr_targetconf()
+{
+	# prep the actual tree, after the patches were done
+	mr_targetconf="config/$1/$6/target.cfg"
+
+	printf "%s\n\n" "$spdx" > \
+	    err "Can't write SPDX to '$mr_targetconf'" prep_mr_targetconf "$@"
+
+	printf "tree=\"%s\"\n" "$6" >> "$mr_targetconf" || \
+	    err "Can't write tree $6 '$mr_targetconf'" prep_mr_targetconf "$@"
+	printf "rev=\"%s\"\n" "$5" >> "$mr_targetconf" || \
+	    err "Can't write rev $5 '$mr_targetconf'" prep_mr_targetconf "$@"
+
+	printf "Created '%s'\n" "$mr_targetconf"
+}
diff --git a/mk b/mk
index 53de360c..78d2a603 100755
--- a/mk
+++ b/mk
@@ -28,6 +28,7 @@ fi
 . "include/rom.sh"
 . "include/release.sh"
 . "include/get.sh"
+. "include/chromebook.sh"
 
 main()
 {
@@ -42,7 +43,7 @@ main()
 	version)
 		printf "%s\nWebsite: %s\n" "$relname" "$projectsite"
 		;;
-	release|download|inject)
+	release|download|inject|prep_mr_import)
 		$cmd "$@"
 		;;
 	-*)