diff --git a/src/sysprof-cli/sysprof-cli.c b/src/sysprof-cli/sysprof-cli.c
index 1fd274fc..009b044c 100644
--- a/src/sysprof-cli/sysprof-cli.c
+++ b/src/sysprof-cli/sysprof-cli.c
@@ -509,7 +509,10 @@ Examples:\n\
       sysprof_profiler_set_spawnable (profiler, spawnable);
 
       if (gjs)
-        add_trace_fd (profiler, spawnable, "GJS_TRACE_FD");
+        {
+          sysprof_spawnable_setenv (spawnable, "GJS_ENABLE_PROFILER", "1");
+          add_trace_fd (profiler, spawnable, "GJS_TRACE_FD");
+        }
 
       if (use_trace_fd)
         add_trace_fd (profiler, spawnable, NULL);
diff --git a/src/sysprof/sysprof-recording-template.c b/src/sysprof/sysprof-recording-template.c
index 965cce13..50f6c957 100644
--- a/src/sysprof/sysprof-recording-template.c
+++ b/src/sysprof/sysprof-recording-template.c
@@ -557,7 +557,10 @@ sysprof_recording_template_apply (SysprofRecordingTemplate  *self,
       sysprof_profiler_set_spawnable (profiler, spawnable);
 
       if (self->javascript_stacks)
-        add_trace_fd (profiler, spawnable, "GJS_TRACE_FD");
+        {
+          sysprof_spawnable_setenv (spawnable, "GJS_ENABLE_PROFILER", "1");
+          add_trace_fd (profiler, spawnable, "GJS_TRACE_FD");
+        }
     }
 
   if (self->power_profile && self->power_profile[0])