diff --git a/Makefile b/Makefile
index 31e7410..110f6f2 100644
--- a/Makefile
+++ b/Makefile
@@ -31,4 +31,8 @@ run:
 format:
 	$(DUNE) build --auto-promote @fmt
 	opam lint --normalise tcalc.opam > tcalc.tmp && mv tcalc.tmp tcalc.opam
+	dune format-dune-file dune-project > $$$$ && mv $$$$ dune-project
 	git ls-files '**/*.[ch]' | xargs -n1 indent -nut -i8
+
+# vim:ts=8:noet:
+
diff --git a/dune-project b/dune-project
index 5557da6..c7a9628 100644
--- a/dune-project
+++ b/dune-project
@@ -1,2 +1,27 @@
 (lang dune 2.0)
+
 (name tcalc)
+
+(generate_opam_files true)
+
+(source
+ (github lindig/tcalc))
+
+(license Unlicense)
+
+(authors "Christian Lindig <lindig@gmail.com>")
+
+(maintainers "Christian Lindig <lindig@gmail.com>")
+
+(package
+ (name tcalc)
+ (synopsis "Minimal desktop calculator for timestamps")
+ (description
+  "TCalc implements a minimal desktop calculator that in addition to floating point numbers recognises durations in hh:min:sec format and converts them to seconds. This can simplify time-based calculations.")
+ (depends
+  (dune
+   (>= "2.0"))
+  (ocaml
+   (>= 4.08.0))
+  (linenoise
+   (>= 1.3.1))))
diff --git a/tcalc.opam b/tcalc.opam
index 6f34d97..1cc398c 100644
--- a/tcalc.opam
+++ b/tcalc.opam
@@ -14,5 +14,18 @@ depends: [
   "ocaml" {>= "4.08.0"}
   "linenoise" {>= "1.3.1"}
 ]
-build: ["dune" "build" "-p" name "-j" jobs]
+build: [
+  ["dune" "subst"] {pinned}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
 dev-repo: "git+https://github.com/lindig/tcalc.git"