diff --git a/Userland/Utilities/CMakeLists.txt b/Userland/Utilities/CMakeLists.txt
index 8b3f1ef9e75..1a562336637 100644
--- a/Userland/Utilities/CMakeLists.txt
+++ b/Userland/Utilities/CMakeLists.txt
@@ -90,6 +90,7 @@ target_link_libraries(expr LibRegex)
 target_link_libraries(fdtdump LibDeviceTree LibMain)
 target_link_libraries(file LibGfx LibIPC LibCompress LibMain)
 target_link_libraries(find LibMain)
+target_link_libraries(flock LibMain)
 target_link_libraries(fortune LibMain)
 target_link_libraries(functrace LibDebug LibX86)
 target_link_libraries(gml-format LibGUI)
diff --git a/Userland/Utilities/flock.cpp b/Userland/Utilities/flock.cpp
index 0172d16f58a..565910139da 100644
--- a/Userland/Utilities/flock.cpp
+++ b/Userland/Utilities/flock.cpp
@@ -5,30 +5,21 @@
  */
 
 #include <AK/Format.h>
-#include <errno.h>
-#include <spawn.h>
-#include <stdio.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 #include <stdlib.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
-    if (argc < 3) {
+    if (arguments.strings.size() < 3) {
         warnln("usage: flock <path> <command...>");
         return 1;
     }
 
-    pid_t child_pid;
-    if ((errno = posix_spawnp(&child_pid, argv[2], nullptr, nullptr, &argv[2], environ))) {
-        perror("posix_spawn");
-        return 1;
-    }
+    pid_t child_pid = TRY(Core::System::posix_spawnp(arguments.strings[2], nullptr, nullptr, &arguments.argv[2], environ));
+    int status = TRY(Core::System::waitpid(child_pid, &status, 0));
 
-    int status;
-    if (waitpid(child_pid, &status, 0) < 0) {
-        perror("waitpid");
-        return 1;
-    }
     return WEXITSTATUS(status);
 }