diff --git a/common/scripts/repl b/common/scripts/repl
index e139dba25..1efe773de 100755
--- a/common/scripts/repl
+++ b/common/scripts/repl
@@ -1,7 +1,18 @@
 #!/usr/bin/env bash
 
 export PENPOT_FLAGS="enable-asserts enable-audit-log $PENPOT_FLAGS"
-export OPTIONS="-A:dev -J-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager -J-XX:+UseG1GC -J-XX:-OmitStackTraceInFastThrow -J-Xms50m -J-Xmx1024m";
+
+export OPTIONS="
+       -A:dev \
+       -J-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager \
+       -J-Djdk.attach.allowAttachSelf \
+       -J-Dpolyglot.engine.WarnInterpreterOnly=false \
+       -J-XX:+EnableDynamicAgentLoading \
+       -J-XX:-OmitStackTraceInFastThrow \
+       -J-XX:+UnlockDiagnosticVMOptions \
+       -J-XX:+DebugNonSafepoints \
+       -J-Djdk.tracePinnedThreads=full"
+
 export OPTIONS_EVAL="nil"
 # export OPTIONS_EVAL="(set! *warn-on-reflection* true)"