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-rw-r--r--math/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/math/Makefile b/math/Makefile
index 1d5bf16027f0..41a0f8c0c3cc 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -126,6 +126,7 @@
SUBDIR += hs-categories
SUBDIR += hs-category-extras
SUBDIR += hs-comonad
+ SUBDIR += hs-contravariant
SUBDIR += hs-erf
SUBDIR += hs-mwc-random
SUBDIR += hs-probability