diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4b7ae381..4b7cb1e7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -810,7 +810,11 @@ packages:
         - pcre-heavy
 
     "Francesco Mazzoli f@mazzo.li @bitonic":
-        - language-c-quote
+        []
+        # Temporarily blocked due to:
+        # https://github.com/fpco/stackage/issues/509
+        # - language-c-quote
+
 
     "Sönke Hahn soenkehahn@gmail.com @soenkehahn":
         - getopt-generics
@@ -1022,9 +1026,6 @@ packages:
         - librato
         
     "Stackage upper bounds":
-        # https://github.com/fpco/stackage/issues/509
-        - srcloc < 0.5
-
         # https://github.com/fpco/stackage/issues/517
         - generic-deriving < 1.7