diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c1008bb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,5 @@
+[submodule "input/popcorn"]
+	path = input/popcorn
+	url = https://git.martyoeh.me/datasci/ds-voidlinux-popcorn.git
+	datalad-id = 186d720c-0862-453d-8b94-5140f0d67d2e
+	datalad-url = https://git.martyoeh.me/datasci/ds-voidlinux-popcorn.git
diff --git a/input/popcorn b/input/popcorn
new file mode 160000
index 0000000..8ef2148
--- /dev/null
+++ b/input/popcorn
@@ -0,0 +1 @@
+Subproject commit 8ef21489a3a77bf92450988700f50bcb3f57c0c1