diff --git a/build-constraints.yaml b/build-constraints.yaml
index a389f201..80cf3efe 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1721,12 +1721,13 @@ packages:
         # GHC 8 - blosum
 
     "Simon Marechal <bartavelle@gmail.com> @bartavelle":
-        # GHC 8 - compactmap
-        # GHC 8 - stateWriter
+        - compactmap
+        - stateWriter
         - filecache
-        # GHC 8 - pcre-utils
+        - pcre-utils
         - strict-base-types
-        # GHC 8 - withdependencies
+        - withdependencies
+        - hruby
         # http-types
         # - stm-firehose
         # - hslogstash
diff --git a/debian-bootstrap.sh b/debian-bootstrap.sh
index 8b3cfacb..8d4469ce 100755
--- a/debian-bootstrap.sh
+++ b/debian-bootstrap.sh
@@ -105,6 +105,7 @@ apt-get install -y \
     npm \
     r-base \
     r-base-dev \
+    ruby-dev \
     wget \
     zip \
     stack \