Simplify and speed up Haskell module running

docker/haskell/run.sh

@@ -4,10 +4,7 @@ else
     mkdir "$COUNT" && cd "$COUNT"
 
     echo "$1" > program.hs
-    ghc -O0 -j +RTS -A128m -n2m -RTS \
-        -no-keep-o-files -no-keep-hi-files \
-        program.hs >/dev/null \
-        && ./program
+    ghc -e main program.hs
 
     cd .. && rm -rf "$COUNT"
 fi