diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc
index 61c05050f..df8932087 100644
--- a/src/libcmd/repl.cc
+++ b/src/libcmd/repl.cc
@@ -1050,7 +1050,7 @@ struct CmdRepl : InstallablesCommand
         evalSettings.pureEval = false;
     }
 
-    void prepare()
+    void prepare() override
     {
         if (!settings.isExperimentalFeatureEnabled(Xp::ReplFlake) && !(file) && this->_installables.size() >= 1) {
             warn("future versions of Nix will require using `--file` to load a file");
diff --git a/src/libmain/progress-bar.cc b/src/libmain/progress-bar.cc
index 0bbeaff8d..961f4e18a 100644
--- a/src/libmain/progress-bar.cc
+++ b/src/libmain/progress-bar.cc
@@ -503,7 +503,7 @@ public:
         return s[0];
     }
 
-    virtual void setPrintBuildLogs(bool printBuildLogs)
+    void setPrintBuildLogs(bool printBuildLogs) override
     {
         this->printBuildLogs = printBuildLogs;
     }