diff --git a/Makefile b/Makefile
index f59b75f35..a34f0be64 100644
--- a/Makefile
+++ b/Makefile
@@ -30,9 +30,5 @@ bin: build
 	mkdir -p $(SHARD_BIN)
 	cp ./bin/ameba $(SHARD_BIN)
 
-.PHONY: run_file
-run_file:
-	cp -n ./bin/ameba.cr $(SHARD_BIN) || true
-
 .PHONY: test
 test: spec lint
diff --git a/shard.yml b/shard.yml
index 5fa36b7a0..b2f1f6519 100644
--- a/shard.yml
+++ b/shard.yml
@@ -10,10 +10,11 @@ targets:
 
 scripts:
   # TODO: remove pre-compiled executable in future releases
-  postinstall: make bin && make run_file
+  postinstall: shards build -Dpreview_mt
 
 executables:
   - ameba
+  - ameba.cr
 
 crystal: "~> 1.7.0"