diff --git a/basis/alien/libraries/finder/linux/platforms.txt b/basis/alien/libraries/finder/linux/platforms.txt
new file mode 100644
index 0000000000..a08e1f35eb
--- /dev/null
+++ b/basis/alien/libraries/finder/linux/platforms.txt
@@ -0,0 +1 @@
+linux
diff --git a/basis/alien/libraries/finder/macosx/platforms.txt b/basis/alien/libraries/finder/macosx/platforms.txt
new file mode 100644
index 0000000000..6e806f449e
--- /dev/null
+++ b/basis/alien/libraries/finder/macosx/platforms.txt
@@ -0,0 +1 @@
+macosx