diff --git a/extra/libretls/build b/extra/libretls/build
new file mode 100755
index 00000000..76301af8
--- /dev/null
+++ b/extra/libretls/build
@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+./configure \
+    --prefix=/usr
+
+make
+make install
diff --git a/extra/libretls/checksums b/extra/libretls/checksums
new file mode 100644
index 00000000..df4c6ccb
--- /dev/null
+++ b/extra/libretls/checksums
@@ -0,0 +1 @@
+59ce9961cb1b1a2859cacb9863eeccc3bbeadf014840a1c61a0ac12ad31bcc9e
diff --git a/extra/libretls/depends b/extra/libretls/depends
new file mode 100644
index 00000000..fc538edf
--- /dev/null
+++ b/extra/libretls/depends
@@ -0,0 +1 @@
+openssl
\ No newline at end of file
diff --git a/extra/libretls/sources b/extra/libretls/sources
new file mode 100644
index 00000000..2bfa8e37
--- /dev/null
+++ b/extra/libretls/sources
@@ -0,0 +1 @@
+https://causal.agency/libretls/libretls-VERSION.tar.gz
diff --git a/extra/libretls/version b/extra/libretls/version
new file mode 100644
index 00000000..9580b4b8
--- /dev/null
+++ b/extra/libretls/version
@@ -0,0 +1 @@
+3.5.2 1