diff --git a/src/Options.cc b/src/Options.cc
index c35b9753bb..fe88abcb50 100644
--- a/src/Options.cc
+++ b/src/Options.cc
@@ -15,14 +15,16 @@
 #include "bsd-getopt-long.h"
 #include "logging/writers/ascii/Ascii.h"
 
-void zeek::Options::filter_supervisor_options()
+namespace zeek {
+
+void Options::filter_supervisor_options()
 	{
 	pcap_filter = {};
 	signature_files = {};
 	pcap_output_file = {};
 	}
 
-void zeek::Options::filter_supervised_node_options()
+void Options::filter_supervised_node_options()
 	{
 	auto og = *this;
 	*this = {};
@@ -64,14 +66,14 @@ void zeek::Options::filter_supervised_node_options()
 	script_options_to_set = og.script_options_to_set;
 	}
 
-bool zeek::fake_dns()
+bool fake_dns()
 	{
 	return zeek::util::zeekenv("ZEEK_DNS_FAKE");
 	}
 
 extern const char* zeek_version();
 
-void zeek::usage(const char* prog, int code)
+void usage(const char* prog, int code)
 	{
 	fprintf(stderr, "zeek version %s\n", zeek_version());
 
@@ -138,9 +140,9 @@ void zeek::usage(const char* prog, int code)
 	exit(code);
 	}
 
-zeek::Options zeek::parse_cmdline(int argc, char** argv)
+Options parse_cmdline(int argc, char** argv)
 	{
-	zeek::Options rval;
+	Options rval;
 
 	// When running unit tests, the first argument on the command line must be
 	// --test, followed by doctest options. Optionally, users can use "--" as
@@ -479,3 +481,5 @@ zeek::Options zeek::parse_cmdline(int argc, char** argv)
 
 	return rval;
 	}
+
+} // namespace zeek
diff --git a/src/zeek-setup.cc b/src/zeek-setup.cc
index d9d690121e..8d458814fe 100644
--- a/src/zeek-setup.cc
+++ b/src/zeek-setup.cc
@@ -158,6 +158,8 @@ int& bro_argc = zeek::detail::zeek_argc;
 char** zeek::detail::zeek_argv;
 char**& bro_argv = zeek::detail::zeek_argv;
 
+namespace zeek {
+
 const char* zeek_version()
 	{
 #ifdef DEBUG
@@ -176,6 +178,8 @@ const char* zeek_version()
 #endif
 	}
 
+namespace detail {
+
 static std::vector<const char*> to_cargs(const std::vector<std::string>& args)
 	{
 	std::vector<const char*> rval;
@@ -187,7 +191,7 @@ static std::vector<const char*> to_cargs(const std::vector<std::string>& args)
 	return rval;
 	}
 
-bool show_plugins(int level)
+static bool show_plugins(int level)
 	{
 	zeek::plugin::Manager::plugin_list plugins = zeek::plugin_mgr->ActivePlugins();
 
@@ -237,7 +241,7 @@ bool show_plugins(int level)
 	return count != 0;
 	}
 
-void done_with_network()
+static void done_with_network()
 	{
 	zeek::util::detail::set_processing_status("TERMINATING", "done_with_network");
 
@@ -284,7 +288,7 @@ void done_with_network()
 	ZEEK_LSAN_DISABLE();
 	}
 
-void terminate_bro()
+static void terminate_bro()
 	{
 	zeek::util::detail::set_processing_status("TERMINATING", "terminate_bro");
 
@@ -344,30 +348,6 @@ void terminate_bro()
 	zeek::reporter = nullptr;
 	}
 
-namespace zeek::net::detail {
-
-void zeek_terminate_loop(const char* reason)
-	{
-	zeek::util::detail::set_processing_status("TERMINATING", reason);
-	zeek::reporter->Info("%s", reason);
-
-	net_get_final_stats();
-	done_with_network();
-	net_delete();
-
-	terminate_bro();
-
-	// Close files after net_delete(), because net_delete()
-	// might write to connection content files.
-	zeek::File::CloseOpenFiles();
-
-	delete zeek::detail::rule_matcher;
-
-	exit(0);
-	}
-
-} // namespace zeek::net::detail
-
 RETSIGTYPE sig_handler(int signo)
 	{
 	zeek::util::detail::set_processing_status("TERMINATING", "sig_handler");
@@ -407,8 +387,8 @@ static std::vector<std::string> get_script_signature_files()
 	return rval;
 	}
 
-zeek::detail::SetupResult zeek::detail::setup(int argc, char** argv,
-                                              zeek::Options* zopts)
+zeek::detail::SetupResult setup(int argc, char** argv,
+                                zeek::Options* zopts)
 	{
 	ZEEK_LSAN_DISABLE();
 	std::set_new_handler(bro_new_handler);
@@ -898,7 +878,7 @@ zeek::detail::SetupResult zeek::detail::setup(int argc, char** argv,
 	return {0, std::move(options)};
 	}
 
-int zeek::detail::cleanup(bool did_net_run)
+int cleanup(bool did_net_run)
 	{
 	if ( did_net_run )
 		done_with_network();
@@ -920,3 +900,30 @@ int zeek::detail::cleanup(bool did_net_run)
 
 	return 0;
 	}
+
+} // namespace detail
+
+namespace net::detail {
+
+void zeek_terminate_loop(const char* reason)
+	{
+	zeek::util::detail::set_processing_status("TERMINATING", reason);
+	zeek::reporter->Info("%s", reason);
+
+	net_get_final_stats();
+	zeek::detail::done_with_network();
+	net_delete();
+
+	zeek::detail::terminate_bro();
+
+	// Close files after net_delete(), because net_delete()
+	// might write to connection content files.
+	zeek::File::CloseOpenFiles();
+
+	delete zeek::detail::rule_matcher;
+
+	exit(0);
+	}
+
+} // namespace net::detail
+} // namespace zeek
diff --git a/src/zeek-setup.h b/src/zeek-setup.h
index 22cb85fde7..89333ac673 100644
--- a/src/zeek-setup.h
+++ b/src/zeek-setup.h
@@ -4,7 +4,7 @@
 
 #include "Options.h"
 
-namespace zeek { namespace detail {
+namespace zeek::detail {
 
 struct SetupResult {
 	int code = 0;
@@ -28,4 +28,4 @@ SetupResult setup(int argc, char** argv, zeek::Options* options = nullptr);
  */
 int cleanup(bool did_net_run);
 
-}} // namespace zeek::detail
+} // namespace zeek::detail
diff --git a/src/zeek.bif b/src/zeek.bif
index 8ff6eaec34..de51649718 100644
--- a/src/zeek.bif
+++ b/src/zeek.bif
@@ -1806,7 +1806,9 @@ function getpid%(%) : count
 	%}
 
 %%{
+namespace zeek {
 extern const char* zeek_version();
+} // namespace zeek
 %%}
 
 ## Returns the Zeek version string.
@@ -1814,7 +1816,7 @@ extern const char* zeek_version();
 ## Returns: Zeek's version, e.g., 2.0-beta-47-debug.
 function zeek_version%(%): string
 	%{
-	return zeek::make_intrusive<zeek::StringVal>(zeek_version());
+	return zeek::make_intrusive<zeek::StringVal>(zeek::zeek_version());
 	%}
 
 ## Converts a record type name to a vector of strings, where each element is