diff --git a/src/Makevars b/src/Makevars
index 4472ccc..dae8732 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -15,8 +15,8 @@
 ## set the appropriate value, possibly CXX17.
 #CXX_STD = CXX11
 
-PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) -Ilibsrc $(SHLIB_OPENMP_CXXFLAGS) ‘$(R_HOME)/bin/Rscript -e "RcppProgress:::CxxFlags()"‘
-PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) ‘$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"‘ $(SHLIB_OPENMP_CXXFLAGS) ‘$(R_HOME)/bin/Rscript -e "RcppProgress:::CxxFlags()"‘
+PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) -Ilibsrc $(SHLIB_OPENMP_CXXFLAGS) 
+PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) 
 #CXXFLAGS=-O3
 CC=ccache clang -Qunused-arguments
 CXX=ccache clang++ -Qunused-arguments