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-rw-r--r--.gitlab-ci.yml2
1 files changed, 1 insertions, 1 deletions
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 84976328f8..f225f1eca5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -92,7 +92,7 @@ validate-x86_64-linux-deb8-hadrian:
- ./configure $CONFIGURE_ARGS
- |
THREADS=`mk/detect-cpu-count.sh`
- make V=0 -j$THREADS
+ make V=0 -j$THREADS WERROR=-Werror
- |
make binary-dist TAR_COMP_OPTS="-1"
mv ghc-*.tar.xz ghc.tar.xz