https://github.com/hyprwm/hyprsunset/commit/2626a7f1d03aeb4a2bf2b5b004b7d4677c033b63
Fixes error `no member named 'zoned_time' in namespace 'std::chrono'` on llvm/musl
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -133,6 +133,16 @@ if(CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES DEBUG)
       "${CMAKE_SHARED_LINKER_FLAGS} -pg -no-pie -fno-builtin")
 endif(CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES DEBUG)
 
+include(CheckCXXSourceCompiles)
+check_cxx_source_compiles([[
+  #include <chrono>
+  int main() { std::chrono::zoned_time{}; }
+]] HAVE_STD_ZONED_TIME)
+
+if (NOT HAVE_STD_ZONED_TIME)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexperimental-library")
+endif()
+
 if(NOT DEFINED CMAKE_INSTALL_MANDIR)
     set(CMAKE_INSTALL_MANDIR "${CMAKE_INSTALL_PREFIX}/share/man")
 endif()
--- a/src/Hyprsunset.cpp
+++ b/src/Hyprsunset.cpp
@@ -1,6 +1,7 @@
 #include "ConfigManager.hpp"
 #include "helpers/Log.hpp"
 #include "IPCSocket.hpp"
+#include <algorithm>
 #include <cstring>
 #include <mutex>
 #include <optional>
@@ -8,6 +9,7 @@
 #include <chrono>
 #include <sys/poll.h>
 #include <sys/timerfd.h>
+#include <unistd.h>
 #include <wayland-client-core.h>
 
 #define TIMESPEC_NSEC_PER_SEC 1000000000L