diff --git a/build.cmd b/build.cmd
index f6d6a34..ece1cbb 100644
--- a/build.cmd
+++ b/build.cmd
@@ -7,7 +7,7 @@
 @echo enum dubVersion = "%GITVER%"; >> source\dub\version_.d
 
 @echo Executing %DC%...
-@%DC% -ofbin\dub.exe -g -debug -w -version=DubUseCurl -version=DubApplication -Isource curl.lib %* @build-files.txt
+@%DC% -ofbin\dub.exe -g -O -w -version=DubUseCurl -version=DubApplication -Isource %* @build-files.txt
 @if errorlevel 1 exit /b 1
 
 @echo DUB has been built. You probably also want to add the following entry to your
diff --git a/curl.lib b/curl.lib
deleted file mode 100644
index 1a1e192..0000000
--- a/curl.lib
+++ /dev/null
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