jpkg: complete binary package setup

ober

7851b56a3161f04c71dc06d86c8959e06288e21c

diff --git a/.gitignore b/.gitignore
index abf1042..c094db6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,4 @@ jsed
 
 # Generated .sls wrappers from src/ .ss source
 lib/**/*.sls
+.jpkg/
diff --git a/jpkg.lock b/jpkg.lock
new file mode 100644
index 0000000..6035213
--- /dev/null
+++ b/jpkg.lock
@@ -0,0 +1,2 @@
+;; jpkg.lock — generated by jpkg; records the exact resolved dependency graph. Do not edit by hand.
+(lock (version 1) (packages ()) )
diff --git a/jpkg.policy.sexp b/jpkg.policy.sexp
new file mode 100644
index 0000000..3f95f7f
--- /dev/null
+++ b/jpkg.policy.sexp
@@ -0,0 +1,3 @@
+(policy
+  (mode dev)
+  (allow (native-build) (ffi)))
diff --git a/jpkg.sexp b/jpkg.sexp
index 5e2c76e..edc262c 100644
--- a/jpkg.sexp
+++ b/jpkg.sexp
@@ -8,4 +8,6 @@
   (modules ((root ".")))
   (dependencies ())
   (dev-dependencies ())
-  (capabilities ()))
+  (capabilities ((native-code reason: "C FFI build support")
+                 (ffi libraries: ())
+                 (executables ("jsed")))))