hikari: use bmake setupHook for build+install phase

pkgs/applications/window-managers/hikari/default.nix

@@ -42,14 +42,11 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  # Must replace GNU Make by bmake
-  buildPhase = with lib; concatStringsSep " " (
-    [ "bmake" "-j$NIX_BUILD_CORES" "PREFIX=$out" ]
+  makeFlags = with lib; [ "PREFIX=$(out)" ]
     ++ optional stdenv.isLinux "WITH_POSIX_C_SOURCE=YES"
     ++ mapAttrsToList (feat: enabled:
          optionalString enabled "WITH_${toUpper feat}=YES"
-       ) features
-  );
+       ) features;
 
   # Can't suid in nix store
   # Run hikari as root (it will drop privileges as early as possible), or create
@@ -58,13 +55,6 @@ stdenv.mkDerivation {
     substituteInPlace Makefile --replace '4555' '555'
   '';
 
-  installPhase = ''
-    bmake \
-      PREFIX=$out \
-      install
-    runHook postInstall
-  '';
-
   meta = with lib; {
     description = "Stacking Wayland compositor which is actively developed on FreeBSD but also supports Linux";
     homepage    = "https://hikari.acmelabs.space";