diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc
index f5738963e..b5a798911 100644
--- a/src/libcmd/repl.cc
+++ b/src/libcmd/repl.cc
@@ -186,7 +186,7 @@ ReplExitStatus NixRepl::mainLoop()
         if (state->debugRepl) {
             debuggerNotice = " debugger";
         }
-        notice("Nix %1%%2%\nType :? for help.", nixVersion, debuggerNotice);
+        notice("Lix %1%%2%\nType :? for help.", nixVersion, debuggerNotice);
     }
 
     isFirstRepl = false;
diff --git a/src/libexpr/print-ambiguous.cc b/src/libexpr/print-ambiguous.cc
index eaba02122..3f3c2c45a 100644
--- a/src/libexpr/print-ambiguous.cc
+++ b/src/libexpr/print-ambiguous.cc
@@ -93,7 +93,7 @@ void printAmbiguous(
         str << v.fpoint;
         break;
     default:
-        printError("Nix evaluator internal error: printAmbiguous: invalid value type");
+        printError("Lix evaluator internal error: printAmbiguous: invalid value type");
         abort();
     }
 }
diff --git a/src/libstore/daemon.cc b/src/libstore/daemon.cc
index 993ade7dc..1181cc9e5 100644
--- a/src/libstore/daemon.cc
+++ b/src/libstore/daemon.cc
@@ -1090,7 +1090,7 @@ void processConnection(
                 tunnelLogger->stopWork(&e);
                 if (!errorAllowed) throw;
             } catch (std::bad_alloc & e) {
-                auto ex = Error("Nix daemon out of memory");
+                auto ex = Error("Lix daemon out of memory");
                 tunnelLogger->stopWork(&ex);
                 throw;
             }
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 3849b1a2f..59fb62d3d 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -47,7 +47,7 @@ extern char * * environ __attribute__((weak));
 
 
 #ifdef NDEBUG
-#error "Nix may not be built with assertions disabled (i.e. with -DNDEBUG)."
+#error "Lix may not be built with assertions disabled (i.e. with -DNDEBUG)."
 #endif
 
 namespace nix {
diff --git a/src/nix/main.cc b/src/nix/main.cc
index f05c49523..a9c6c6ea2 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -243,7 +243,7 @@ static void showHelp(std::vector<std::string> subcommand, NixArgs & toplevel)
 
     auto attr = vRes->attrs->get(state.symbols.create(mdName + ".md"));
     if (!attr)
-        throw UsageError("Nix has no subcommand '%s'", concatStringsSep("", subcommand));
+        throw UsageError("`nix` has no subcommand '%s'", concatStringsSep("", subcommand));
 
     auto markdown = state.forceString(*attr->value, noPos, "while evaluating the lowdown help text");