diff --git a/main/postmarketos-installkernel/APKBUILD b/main/postmarketos-installkernel/APKBUILD
new file mode 100644
index 000000000..ff6a21fbe
--- /dev/null
+++ b/main/postmarketos-installkernel/APKBUILD
@@ -0,0 +1,28 @@
+# Maintainer: Minecrell <minecrell@minecrell.net>
+# Co-Maintainer: Alexey Minnekhanov <alexeymin@postmarketos.org>
+# APKBUILD is inspired by Alpine's:
+# https://gitlab.alpinelinux.org/alpine/aports/-/tree/master/main/installkernel
+pkgname=postmarketos-installkernel
+pkgver=0.1
+pkgrel=0
+pkgdesc="postmarketOS script for installing mainline kernels"
+url="https://gitlab.com/postmarketOS/pmaports/tree/main/postmarketos-installkernel"
+arch="noarch"
+license="GPL-2.0"
+options="!check" # no test suite
+provides="installkernel=3.5-r1"
+provider_priority=100
+replaces="installkernel"
+source="installkernel-pmos"
+
+build() {
+	return 0
+}
+
+package() {
+	install -Dm755 "$srcdir"/installkernel-pmos "$pkgdir"/sbin/installkernel
+}
+
+sha512sums="
+ba3bdb2d27f7b866a49354fcc4b83ec85747a71265c6b585cb062fc1ff00e88faeba7b77f463d6699e81685c8927ee1d316d5934f374aeebfd4949007d8cb4d8  installkernel-pmos
+"
diff --git a/main/postmarketos-installkernel/installkernel-pmos b/main/postmarketos-installkernel/installkernel-pmos
new file mode 100644
index 000000000..08c4209ba
--- /dev/null
+++ b/main/postmarketos-installkernel/installkernel-pmos
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# This script was originally taken from
+# https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/installkernel/installkernel
+# and modified to suit the postmarketOS requirements for installing kernel binary:
+# We don't support flavors - kernel is always installed as "vmlinuz"
+
+set -e
+
+if [ $# -eq 3 ] || [ $# -eq 4 ]; then
+	kernelversion="$1"
+	bootimage="$2"
+	mapfile="$3"
+	destdir="${4:-/boot}"
+else
+	echo "Usage: installkernel <version> <image> <System.map> <directory>"
+	exit 1
+fi
+
+mapdir=$(dirname "$mapfile")
+config="$mapdir"/.config
+
+# backup previous files as ".old"
+for i in vmlinuz System.map config; do
+	if [ -e "$destdir"/$i ]; then
+		cp "$destdir"/$i "$destdir"/$i.old
+	fi
+done
+
+echo "Installing kernel ${kernelversion} files to ${destdir}"
+
+cp "$bootimage" "$destdir"/vmlinuz
+cp "$mapfile" "$destdir"/System.map
+cp "$config" "$destdir"/config
+
+exit 0