diff --git a/README.md b/README.md
index 66b83c4..a0e71d5 100644
--- a/README.md
+++ b/README.md
@@ -42,17 +42,20 @@ If you don't want to or can't build the image, you can find downloads under <rel
 
 ## Dependencies
 
-Building PrawnOS has been tested on Debian 10 Buster (in a VM)
-_stretch doesn't work as the version of gcc-arm-none-eabi is too old_
-This is the only build enviroment that is supported. 
+Building PrawnOS has been tested on Debian 10 Buster (in a VM).
+
+NOTE: _stretch doesn't work as the version of gcc-arm-none-eabi is too old_!
+
+Debian/Buster is the only build enviroment that is supported.
 These packages are required:
 
+<!-- Please keep the packages sorted (and in sync with ./tests/build-image.sh): -->
 ```
-	apt install --no-install-recommends --no-install-suggests parted cgpt git \
-	gawk device-tree-compiler vboot-kernel-utils gcc-arm-none-eabi u-boot-tools \
-	gcc make libc-dev wget g++ cmake binfmt-support qemu-user-static debootstrap \
-	lzip libssl-dev libncurses-dev flex bison sudo patch bc texinfo bzip2 ca-certificates \
-    cpio file gpg gpg-agent kmod udev
+        apt install --no-install-recommends --no-install-suggests \
+        bc binfmt-support bison bzip2 ca-certificates cgpt cmake cpio debootstrap \
+        device-tree-compiler file flex g++ gawk gcc gcc-arm-none-eabi git gpg \
+        gpg-agent kmod libc-dev libncurses-dev libssl-dev lzip make parted patch \
+        qemu-user-static sudo texinfo u-boot-tools udev vboot-kernel-utils wget
 ```
 
 ## Build
diff --git a/tests/build-image.sh b/tests/build-image.sh
index 87828bc..1dc68a1 100755
--- a/tests/build-image.sh
+++ b/tests/build-image.sh
@@ -22,12 +22,12 @@ GITHUB_SHA="$1"
 
 cd "$(dirname "$0")/.."
 
-# Get dependencies listed in README.md:
+# Get dependencies
 apt-get update
-apt-get -y install --no-install-recommends --no-install-suggests bc binfmt-support bison cgpt cmake debootstrap device-tree-compiler flex g++ gawk gcc gcc-arm-none-eabi git libc-dev libncurses-dev libssl-dev lzip make parted patch qemu-user-static texinfo u-boot-tools vboot-kernel-utils wget
 
-# And install stuff that is missing from the Debian/buster container:
-apt-get -y install --no-install-recommends --no-install-suggests bzip2 ca-certificates cpio file gpg gpg-agent kmod udev
+# Note: this is a copy/paste from README.md, if you add anything here, also update it!
+apt-get -y install --no-install-recommends --no-install-suggests bc binfmt-support bison bzip2 ca-certificates cgpt cmake cpio debootstrap device-tree-compiler file flex g++ gawk gcc gcc-arm-none-eabi git gpg gpg-agent kmod libc-dev libncurses-dev libssl-dev lzip make parted patch qemu-user-static sudo texinfo u-boot-tools udev vboot-kernel-utils wget
+
 
 # Note: there's an error for /proc/modules, but at least building the image works fine:
 # libkmod: ERROR ../libkmod/libkmod-module.c:1657 kmod_module_new_from_loaded: could not open /proc/modules: No such file or directory