nixpkgs/pkgs/applications/virtualization/qemu/fix-qemu-ga.patch

diff -Naur a/qga/commands-posix.c b/qga/commands-posix.c
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -109,6 +109,8 @@
         reopen_fd_to_null(1);
         reopen_fd_to_null(2);
 
+        execle("/run/current-system/sw/bin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
+               "hypervisor initiated shutdown", (char*)NULL, environ);
         execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
                "hypervisor initiated shutdown", (char*)NULL, environ);
         _exit(EXIT_FAILURE);
@@ -157,11 +159,13 @@
     pid_t pid;
     Error *local_err = NULL;
     struct timeval tv;
+    static const char hwclock_path_nix[] = "/run/current-system/sw/bin/hwclock";
     static const char hwclock_path[] = "/sbin/hwclock";
     static int hwclock_available = -1;
 
     if (hwclock_available < 0) {
-        hwclock_available = (access(hwclock_path, X_OK) == 0);
+        hwclock_available = (access(hwclock_path_nix, X_OK) == 0) ||
+                            (access(hwclock_path, X_OK) == 0);
     }
 
     if (!hwclock_available) {
@@ -207,6 +211,8 @@
 
         /* Use '/sbin/hwclock -w' to set RTC from the system time,
          * or '/sbin/hwclock -s' to set the system time from RTC. */
+        execle(hwclock_path_nix, "hwclock", has_time ? "-w" : "-s",
+               NULL, environ);
         execle(hwclock_path, "hwclock", has_time ? "-w" : "-s",
                NULL, environ);
         _exit(EXIT_FAILURE);