diff --git a/Makefile b/Makefile
index 8b0a0402..de50a3db 100644
--- a/Makefile
+++ b/Makefile
@@ -22,11 +22,7 @@ sync: sync-server sync-web sync-root sync-common
 	make generate-sql || true
 
 generate-sql:
-	@cd server; \
-		if command -v dotenv && command -v prisma; \
-		then dotenv -e .env.dev -- prisma generate --sql; \
-		else bunx dotenv -e .env.dev -- bunx prisma generate --sql; \
-		fi
+	@cd server; bunx dotenv -e .env.dev -- bunx prisma generate --sql
 
 start: start-all # build -> serve
 build: build-server build-web
@@ -62,7 +58,7 @@ docker-watch:
 	docker compose up --build --watch
 
 seed:
-	cd server; if command -v prisma; then prisma db seed; else bunx prisma db seed; fi
+	cd server; bunx prisma db seed
 
 ## server/.envをDATABASE_URL=postgres://user:password@localhost:5432/databaseにしてから行う
 dev-db: export DATABASE_URL=$(LOCAL_DB)
@@ -82,9 +78,7 @@ dev-db:
 		sleep 1; \
 	done
 	@echo "PostgreSQL is ready. Running seed..."
-	@cd server; if command -v prisma; then \
-		prisma generate; prisma db push; else \
-		bunx prisma generate; bunx prisma db push; fi
+	@cd server; bunx prisma generate; bunx prisma db push
 	@make seed
 	@echo "Seeding completed."
 
@@ -95,8 +89,8 @@ sync-web:
 	# copy .env.sample -> .env only if .env is not there
 
 sync-server:
-	cd server; bun install
-	cd server; if command -v prisma; then prisma generate; else bunx prisma generate; fi
+	cd server; bun install --frozen-lockfile
+	cd server; bun prisma generate
 	# copy .env.sample -> .env only if .env is not there
 
 sync-root: