diff --git a/build-constraints.yaml b/build-constraints.yaml
index 198d2218..d6114cfa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -9510,6 +9510,7 @@ expected-haddock-failures:
 
 # For packages with haddock issues
 skipped-haddocks:
+- amazonka-ec2 # Large memory consumption - https://github.com/brendanhay/amazonka/issues/549
 - modular # Module uses compiler plugins https://github.com/haskell/haddock/issues/900
 # end of skipped-haddocks
 
@@ -9882,6 +9883,7 @@ no-revisions:
 # Do not build these packages in parallel with others. Useful for high memory
 # usage.
 non-parallel-builds:
+- amazonka-ec2 # Large memory consumption - https://github.com/brendanhay/amazonka/issues/549
 - pandoc
 - gogol-dfareporting
 - gogol-compute