diff -Nru orig/bioacoustics/src/Makevars.ucrt patched/bioacoustics/src/Makevars.ucrt
--- orig/bioacoustics/src/Makevars.ucrt	1970-01-01 01:00:00.000000000 +0100
+++ patched/bioacoustics/src/Makevars.ucrt	2021-02-17 19:45:27.348673200 +0100
@@ -0,0 +1,11 @@
+
+PKG_CXX_STD = CXX11
+
+PKG_LIBS = -lfftw3 -fopenmp -lsox
+
+all: clean 
+
+clean:
+	rm -f $(SHLIB) $(OBJECTS)
+
+.PHONY: all clean