add outputs.flashable - flashable firmware.bin

kernel/dtb.nix

@@ -1,18 +1,22 @@
 {
   stdenv
 , dtc
+, lib
 }:
 { dts
 , includes
+, commandLine
 }:let
   cppDtSearchFlags = builtins.concatStringsSep " " (map (f: "-I${f}") includes);
   dtcSearchFlags = builtins.concatStringsSep " " (map (f: "-i${f}") includes);
+  cmdline = lib.concatStringsSep " " commandLine;
 in stdenv.mkDerivation {
   name = "dtb";
   phases = [ "buildPhase" ];
   nativeBuildInputs = [ dtc ];
   buildPhase = ''
     ${stdenv.cc.targetPrefix}cpp -nostdinc -x assembler-with-cpp ${cppDtSearchFlags} -undef -D__DTS__  -o dtb.tmp ${dts}
+    echo '/{ chosen { bootargs = ${builtins.toJSON cmdline}; }; };'  >> dtb.tmp
     dtc ${dtcSearchFlags} -I dts  -O dtb -o $out dtb.tmp
     test -e $out
   '';