diff --git a/config/build_config.txt b/config/build_config.txt
index aee15e6955..15f44bb57f 100644
--- a/config/build_config.txt
+++ b/config/build_config.txt
@@ -2,4 +2,4 @@ nim_comment="key-value pairs for windows/posix bootstrapping build scripts"
 nim_csourcesDir=csources_v1
 nim_csourcesUrl=https://github.com/nim-lang/csources_v1.git
 nim_csourcesBranch=master
-nim_csourcesHash=5e9be0383f842c9c22ae86e41946a896c43e95d0
+nim_csourcesHash=561b417c65791cd8356b5f73620914ceff845d10