i think this works

flake.nix

@@ -73,6 +73,7 @@
 
         darwinPkgs = nixpkgs.lib.optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [
           Foundation
+          MediaPlayer
         ]);
       in
         with pkgs; {

meson.build

@@ -79,13 +79,34 @@ endforeach
 
 deps = []
 
-deps += dependency('fmt')
+fmt     = dependency('fmt', required: false)
-deps += dependency('libcurl')
+libcurl = dependency('libcurl', required: false)
-deps += dependency('tomlplusplus')
+tomlpp  = dependency('tomlplusplus', required: false)
-deps += dependency('yyjson')
+yyjson  = dependency('yyjson', required: false)
+
+if not fmt.found()
+  fmt = cpp.find_library('fmt', required: true)
+endif
+
+if not libcurl.found()
+  libcurl = cpp.find_library('curl', required: true)
+endif
+
+if not tomlpp.found()
+  tomlpp = cpp.find_library('tomlplusplus', required: true)
+endif
+
+if not yyjson.found()
+  yyjson = cpp.find_library('yyjson', required: true)
+endif
+
+foreach dep : [fmt, libcurl, tomlpp, yyjson]
+  deps += dep
+endforeach
 
 if host_machine.system() == 'darwin'
   deps += dependency('Foundation')
+  deps += dependency('MediaPlayer')
 endif
 
 if host_machine.system() == 'linux'

src/config/weather.cpp

@@ -130,7 +130,7 @@ WeatherOutput Weather::getWeatherInfo() const {
         "weather?q={}&appid={}&units={}",
         location, apiKey, units);
 
-    result = MakeApiRequest(apiUrl);
+    result = MakeApiRequest(apiUrl).value();
   } else {
     const auto [lat, lon] = get<Coords>(loc);
 
@@ -141,7 +141,7 @@ WeatherOutput Weather::getWeatherInfo() const {
         "weather?lat={:.3f}&lon={:.3f}&appid={}&units={}",
         lat, lon, apiKey, units);
 
-    result = MakeApiRequest(apiUrl);
+    result = MakeApiRequest(apiUrl).value();
   }
 
   // Update the cache with the new data