diff --git a/dev-python/mypy/mypy-1.6.0.ebuild b/dev-python/mypy/mypy-1.6.0.ebuild
index 7259aa487598e..b4dcd20e33f14 100644
--- a/dev-python/mypy/mypy-1.6.0.ebuild
+++ b/dev-python/mypy/mypy-1.6.0.ebuild
@@ -56,7 +56,7 @@ distutils_enable_tests pytest
 
 # frustratingly, mypyc produces non-deterministic output. If ccache is enabled it will be a waste of time,
 # but simultaneously it might trash your system and fill up the cache with a giant wave of non-reproducible
-# test files
+# test files (https://github.com/mypyc/mypyc/issues/1014)
 export CCACHE_DISABLE=1
 
 src_compile() {