diff --git a/src/Makevars b/src/Makevars
index 0753640..88c2548 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,6 +1,6 @@
 ## Use the R_HOME indirection to support installations of multiple R version
-###PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
-###PKG_CXXFLAGS = -DNDEBUG -DEIGEN_DONT_VECTORIZE
-CC=ccache clang -Qunused-arguments
-CXX=ccache clang++ -Qunused-arguments
-CCACHE_CPP2=yes
\ No newline at end of file
+PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
+PKG_CXXFLAGS = -DEIGEN_DONT_VECTORIZE
+##CC=ccache clang -Qunused-arguments
+##CXX=ccache clang++ -Qunused-arguments
+##CCACHE_CPP2=yes