Add build derivation

flake.nix

@@ -32,6 +32,32 @@
               opencv-custom
             ];
           };
+          packages.default = pkgs.stdenv.mkDerivation {
+            name = "video-streaming-poc";
+            src = ./.;
+
+            nativeBuildInputs = with pkgs; [
+              meson
+              ninja
+              pkg-config
+            ];
+
+            buildInputs = with pkgs; [
+              boost
+              opencv-custom
+            ];
+
+            buildPhase = ''
+              meson setup --wipe build
+              meson compile
+            '';
+
+            installPhase = ''
+              mkdir -p $out/bin
+              cp build/client $out/bin/
+              cp build/server $out/bin/
+            '';
+          };
         }
       );
 }