diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5ddc3e01..3b4684b1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2415,8 +2415,7 @@ packages:
     "Patrick Chilton <chpatrick@gmail.com>":
         - solga
         - solga-swagger
-        # https://github.com/fpco/stackage/pull/1692
-        #- clang-pure
+        - clang-pure
         - webrtc-vad
 
     "Michal Konecny <mikkonecny@gmail.com>":
diff --git a/debian-bootstrap.sh b/debian-bootstrap.sh
index 7eb88074..8583155d 100755
--- a/debian-bootstrap.sh
+++ b/debian-bootstrap.sh
@@ -46,6 +46,7 @@ apt-get install -y \
     libblas-dev \
     libbz2-dev \
     libcairo2-dev \
+    libclang-3.7-dev \
     libcurl4-openssl-dev \
     libdevil-dev \
     libedit-dev \