diff --git a/src/opus.mk b/src/opus.mk
index 994405c2..2e57505d 100644
--- a/src/opus.mk
+++ b/src/opus.mk
@@ -15,7 +15,7 @@ define $(PKG)_UPDATE
     $(SED) -n 's,.*opus-\([0-9][^>]*\)\.tar.*,\1,p' | \
     grep -v 'alpha' | \
     grep -v 'beta' | \
-    sort -Vr | \
+    $(SORT) -Vr | \
     head -1
 endef
 
diff --git a/src/opusfile.mk b/src/opusfile.mk
index 766648f3..b14f4694 100644
--- a/src/opusfile.mk
+++ b/src/opusfile.mk
@@ -15,7 +15,7 @@ define $(PKG)_UPDATE
     $(SED) -n 's,.*opusfile-\([0-9][^>]*\)\.tar.*,\1,p' | \
     grep -v 'alpha' | \
     grep -v 'beta' | \
-    sort -Vr | \
+    $(SORT) -Vr | \
     head -1
 endef