diff --git a/tools/utils.py b/tools/utils.py
index 27a8feb..85fda69 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -54,7 +54,7 @@
 R8_JAR = os.path.join(LIBS, 'r8.jar')
 R8_WITH_RELOCATED_DEPS_JAR = os.path.join(LIBS, 'r8_with_relocated_deps.jar')
 R8LIB_JAR = os.path.join(LIBS, 'r8lib.jar')
-R8LIB_MAP = os.path.join(LIBS, 'r8lib.jar.map')
+R8LIB_MAP = '%s.map' % R8LIB_JAR
 R8_SRC_JAR = os.path.join(LIBS, 'r8-src.jar')
 R8LIB_EXCLUDE_DEPS_JAR = os.path.join(LIBS, 'r8lib-exclude-deps.jar')
 R8_FULL_EXCLUDE_DEPS_JAR = os.path.join(LIBS, 'r8-full-exclude-deps.jar')