diff --git a/srcpkgs/c-blosc/template b/srcpkgs/c-blosc/template
index a488bfbf05d..9dceb83b2cd 100644
--- a/srcpkgs/c-blosc/template
+++ b/srcpkgs/c-blosc/template
@@ -1,5 +1,6 @@
 # Template file for 'c-blosc'
 pkgname=c-blosc
+# 1.21.0 only updates vendored libraries, we use system ones
 version=1.20.1
 revision=1
 build_style=cmake