diff --git a/build-constraints.yaml b/build-constraints.yaml
index bdbe7f9f..a128e63a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -741,6 +741,7 @@ packages:
     "Leon Mergen leon@solatis.com @solatis":
         - bitcoin-script
         - bitcoin-tx
+        - hexstring
         - network-attoparsec
         - network-anonymous-i2p
 
@@ -877,6 +878,14 @@ packages:
     "Taylor Fausak <taylor@fausak.me> @tfausak":
         - flow
 
+    "Marios Titas <redneb@gmx.com> @redneb":
+        - btrfs
+        - disk-free-space
+        - hxt-css
+        - islink
+        - linux-file-extents
+        - linux-namespaces
+
     "Stackage upper bounds":
         # GHC 7.8 uppdate bound
         - haddock-api < 2.16