diff --git a/builder.sh b/builder.sh
index 2f352f6..987d585 100755
--- a/builder.sh
+++ b/builder.sh
@@ -34,7 +34,6 @@ cp -r ../psfgen ./sb
 mkdir -p $out/lib/namd
 cp -r * $out/lib/namd
 cd ..
-rm -rf Linux-x86_64-g++
 
 mkdir -p $out/bin
 ln -s $out/lib/namd2 $out/bin/namd2