diff -Nru orig/cblasr/src/Makevars.ucrt patched/cblasr/src/Makevars.ucrt
--- orig/cblasr/src/Makevars.ucrt	1970-01-01 01:00:00.000000000 +0100
+++ patched/cblasr/src/Makevars.ucrt	2021-02-17 19:45:39.614744600 +0100
@@ -0,0 +1,2 @@
+PKG_LIBS = $(BLAS_LIBS) $(LAPACK_LIBS) $(FLIBS)
+PKG_CPPFLAGS = -I. -I../inst/include/