diff --git a/extra/json-c/build b/extra/json-c/build
new file mode 100755
index 00000000..7f4f480b
--- /dev/null
+++ b/extra/json-c/build
@@ -0,0 +1,12 @@
+#!/bin/sh -e
+
+export DESTDIR="$1"
+
+cmake -B build \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    -DCMAKE_INSTALL_LIBDIR=lib \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DBUILD_TESTING=OFF
+
+cmake --build   build
+cmake --install build
diff --git a/extra/json-c/checksums b/extra/json-c/checksums
new file mode 100644
index 00000000..8c4397bc
--- /dev/null
+++ b/extra/json-c/checksums
@@ -0,0 +1 @@
+4ba9a090a42cf1e12b84c64e4464bb6fb893666841d5843cc5bef90774028882
diff --git a/extra/json-c/depends b/extra/json-c/depends
new file mode 100644
index 00000000..7d91ec22
--- /dev/null
+++ b/extra/json-c/depends
@@ -0,0 +1 @@
+cmake make
diff --git a/extra/json-c/sources b/extra/json-c/sources
new file mode 100644
index 00000000..d72f151b
--- /dev/null
+++ b/extra/json-c/sources
@@ -0,0 +1 @@
+https://github.com/json-c/json-c/archive/json-c-0.15-20200726.tar.gz
diff --git a/extra/json-c/version b/extra/json-c/version
new file mode 100644
index 00000000..a78cbfce
--- /dev/null
+++ b/extra/json-c/version
@@ -0,0 +1 @@
+0.15 1