diff --git a/lix/nix/main.cc b/lix/nix/main.cc
index 9fb620abb..053df9b01 100644
--- a/lix/nix/main.cc
+++ b/lix/nix/main.cc
@@ -26,6 +26,7 @@
 #include "nix-instantiate.hh"
 #include "nix-store.hh"
 #include "prefetch-command.hh"
+#include "run.hh"
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -35,10 +36,6 @@
 
 #include <nlohmann/json.hpp>
 
-extern std::string chrootHelperName;
-
-void chrootHelper(int argc, char * * argv);
-
 namespace nix {
 
 void registerLegacyCommands()
diff --git a/lix/nix/run.cc b/lix/nix/run.cc
index 02fa1a306..2953bdf91 100644
--- a/lix/nix/run.cc
+++ b/lix/nix/run.cc
@@ -11,6 +11,7 @@
 #include "lix/libexpr/eval.hh"
 #include "lix/libstore/build/personality.hh"
 #include "lix/libutil/current-process.hh"
+#include "run.hh"
 
 #if __linux__
 #include "lix/libstore/temporary-dir.hh"
@@ -19,10 +20,6 @@
 
 #include <queue>
 
-using namespace nix;
-
-std::string chrootHelperName = "__run_in_chroot";
-
 namespace nix {
 
 void runProgramInStore(ref<Store> store,
@@ -50,7 +47,7 @@ void runProgramInStore(ref<Store> store,
 
     if (store->config().storeDir != store2->getRealStoreDir()) {
         Strings helperArgs = {
-            chrootHelperName,
+            std::string(chrootHelperName),
             store->config().storeDir,
             store2->getRealStoreDir(),
             std::string(system.value_or("")),
@@ -74,8 +71,6 @@ void runProgramInStore(ref<Store> store,
     throw SysError("unable to execute '%s'", program);
 }
 
-}
-
 struct CmdShell : InstallablesCommand, MixEnvironment
 {
 
@@ -306,3 +301,5 @@ void chrootHelper(int argc, char * * argv)
     throw Error("mounting the Nix store on '%s' is not supported on this platform", storeDir);
 #endif
 }
+
+}
diff --git a/lix/nix/run.hh b/lix/nix/run.hh
index a169734ae..3f1baf1bd 100644
--- a/lix/nix/run.hh
+++ b/lix/nix/run.hh
@@ -5,15 +5,18 @@
 
 namespace nix {
 
-enum struct UseSearchPath {
-    Use,
-    DontUse
-};
+static constexpr std::string_view chrootHelperName = "__run_in_chroot";
 
-void runProgramInStore(ref<Store> store,
+void chrootHelper(int argc, char ** argv);
+
+enum struct UseSearchPath { Use, DontUse };
+
+void runProgramInStore(
+    ref<Store> store,
     UseSearchPath useSearchPath,
     const std::string & program,
     const Strings & args,
-    std::optional<std::string_view> system = std::nullopt);
+    std::optional<std::string_view> system = std::nullopt
+);
 
 }