build: build artifacts not being placed in build directory

justfile

@@ -8,7 +8,7 @@ default:
 # build musician 
 build:
   mkdir -p {{target}}
-  ghc -O2 -o {{target}}/{{exec}} *.hs
+  ghc -O2 -odir {{target}} -hidir {{target}} -o {{target}}/{{exec}} *.hs
 
 # run musician 
 run: