diff --git a/weigh.cabal b/weigh.cabal
index 18ba3e4..6075ae4 100644
--- a/weigh.cabal
+++ b/weigh.cabal
@@ -25,9 +25,10 @@ library
                      , mtl
                      , split
                      , temporary
-                     , ghc >= 8.2.1
                      , criterion-measurement
   default-language:    Haskell2010
+  if impl(ghc < 8.2.1)
+    buildable: false
 
 test-suite weigh-test
   default-language:    Haskell2010