Avoid filename conflicts and cleanup files after

docker/haskell/run.sh

@@ -1,6 +1,13 @@
 if [ "$EVAL_EXPR" = "true" ]; then
     ghc -e "$1"
 else
+    mkdir "$COUNT" && cd "$COUNT"
+
     echo "$1" > program.hs
-    ghc -O0 -j +RTS -A128m -n2m -RTS program.hs >/dev/null && ./program
+    ghc -O0 -j +RTS -A128m -n2m -RTS \
+        -no-keep-o-files -no-keep-hi-files \
+        program.hs >/dev/null \
+        && ./program
+    
+    cd .. && rm -rf "$COUNT"
 fi