diff --git a/byg/byg.cabal b/byg/byg.cabal
index 7d051d9..2436f7c 100644
--- a/byg/byg.cabal
+++ b/byg/byg.cabal
@@ -13,15 +13,21 @@ common common
     ghc-options: -Wall
     default-language: GHC2024
 
-executable byg
-    import:           common
-    main-is:          Main.hs
-    other-modules:
+library
+    import: common
+    hs-source-dirs: src
+    exposed-modules:
         Sources
         Functions
         ComputationM
-    hs-source-dirs:   src
     build-depends:
         base
       , mtl
       , bytestring
+
+executable byg
+    import: common
+    main-is: src/Main.hs
+    build-depends:
+        base
+      , byg