diff --git a/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix b/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix
index 103d6787a03c..0e6eb251091c 100644
--- a/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix
+++ b/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix
@@ -17,6 +17,10 @@
   sdImage = {
     populateFirmwareCommands = let
       configTxt = pkgs.writeText "config.txt" ''
+        # u-boot refuses to start (gets stuck at rainbow polygon) without this,
+        # at least on Raspberry Pi 0.
+        enable_uart=1
+
         # Prevent the firmware from smashing the framebuffer setup done by the mainline kernel
         # when attempting to show low-voltage or overtemperature warnings.
         avoid_warnings=1
@@ -28,7 +32,7 @@
         kernel=u-boot-rpi1.bin
       '';
       in ''
-        (cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/firmware/)
+        (cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf *.dtb $NIX_BUILD_TOP/firmware/)
         cp ${pkgs.ubootRaspberryPiZero}/u-boot.bin firmware/u-boot-rpi0.bin
         cp ${pkgs.ubootRaspberryPi}/u-boot.bin firmware/u-boot-rpi1.bin
         cp ${configTxt} firmware/config.txt