diff --git a/lix/libutil/processes.cc b/lix/libutil/processes.cc
index 4532ae6b9..6b22c4ecd 100644
--- a/lix/libutil/processes.cc
+++ b/lix/libutil/processes.cc
@@ -346,6 +346,7 @@ RunningProgram runProgram2(const RunOptions & options)
 
     out.writeSide.close();
 
+    debug("Running %s %s", shellEscape(options.program), concatMapStringsSep(" ", options.args, shellEscape));
     return RunningProgram{
         options.program,
         std::move(pid),