diff --git a/build_tarballs.jl b/build_tarballs.jl
index 5d48bb4..9cc6696 100644
--- a/build_tarballs.jl
+++ b/build_tarballs.jl
@@ -9,11 +9,11 @@ sources = [
 # Bash recipe for building across all platforms
 script = raw"""
 cd $WORKSPACE/srcdir/xsum
-mkdir -p ${libdir}
+mkdir -p ${prefix}/lib
 if [[ $target == i686-* ]]; then
     xsumfpmath="-mfpmath=sse"
 fi
-${CC} ${LDFLAGS} -shared -fPIC -O3 -std=c99 ${xsumfpmath} -fno-inline-functions -o ${libdir}/libxsum.${dlext} xsum.c pbinary.c
+${CC} ${LDFLAGS} -shared -fPIC -O3 -std=c99 ${xsumfpmath} -fno-inline-functions -o ${prefix}/lib/libxsum.${dlext} xsum.c pbinary.c
 """
 
 # These are the platforms we will build for by default, unless further