diff --git a/build/root/Makefile.generated_files b/build/root/Makefile.generated_files
index abe198b2716..c8cbf27997f 100644
--- a/build/root/Makefile.generated_files
+++ b/build/root/Makefile.generated_files
@@ -182,7 +182,7 @@ $(META_DIR)/$(DEEPCOPY_GEN).todo: $(DEEPCOPY_FILES)
 
 $(DEEPCOPY_FILES): $(DEEPCOPY_GEN)
 	if [[ "$(DBG_CODEGEN)" == 1 ]]; then        \
-	    echo "DBG: deepcopy needed $(@D): $?";  \
+	    echo "DBG: deepcopy needed $(@D):";  \
 	    ls -lf --full-time $@ $? || true;       \
 	fi
 	echo $(PRJ_SRC_PATH)/$(@D) >> $(META_DIR)/$(DEEPCOPY_GEN).todo
@@ -276,7 +276,7 @@ $(META_DIR)/$(DEFAULTER_GEN).todo: $(DEFAULTER_FILES)
 
 $(DEFAULTER_FILES): $(DEFAULTER_GEN)
 	if [[ "$(DBG_CODEGEN)" == 1 ]]; then         \
-	    echo "DBG: defaulter needed $(@D): $?";  \
+	    echo "DBG: defaulter needed $(@D):";  \
 	    ls -lf --full-time $@ $? || true;        \
 	fi
 	echo $(PRJ_SRC_PATH)/$(@D) >> $(META_DIR)/$(DEFAULTER_GEN).todo
@@ -380,7 +380,7 @@ $(META_DIR)/$(CONVERSION_GEN).todo: $(CONVERSION_FILES)
 
 $(CONVERSION_FILES): $(CONVERSION_GEN)
 	if [[ "$(DBG_CODEGEN)" == 1 ]]; then          \
-	    echo "DBG: conversion needed $(@D): $?";  \
+	    echo "DBG: conversion needed $(@D):";  \
 	    ls -lf --full-time $@ $? || true;         \
 	fi
 	echo $(PRJ_SRC_PATH)/$(@D) >> $(META_DIR)/$(CONVERSION_GEN).todo