diff --git a/default.nix b/default.nix
index 3367e51..223cbda 100644
--- a/default.nix
+++ b/default.nix
@@ -43,4 +43,11 @@ in stdenv.mkDerivation {
     modemmanager
     sofia_sip
   ];
+
+  # build for debug:
+  dontStrip = true;
+  env.mesonBuildType = "debugoptimized";
+  env.NIX_CFLAGS_COMPILE = "-ggdb -Og -fno-omit-frame-pointer";
+  # env.mesonBuildType = "debug";
+  # env.NIX_CFLAGS_COMPILE = "-g -O0 -fno-omit-frame-pointer";
 }