diff --git a/packages/piqi/piqi.0.7.8/opam b/packages/piqi/piqi.0.7.8/opam
new file mode 100644
index 00000000000..805f0e644a7
--- /dev/null
+++ b/packages/piqi/piqi.0.7.8/opam
@@ -0,0 +1,39 @@
+opam-version: "2.0"
+synopsis: "Protocol Buffers, JSON and XML serialization system for OCaml"
+authors: "Anton Lavrik <alavrik@piqi.org>"
+maintainer: "Anton Lavrik <alavrik@piqi.org>"
+license: "Apache-2.0"
+homepage: "https://github.com/alavrik/piqi-ocaml"
+bug-reports: "https://github.com/alavrik/piqi-ocaml/issues"
+depends: [
+  "ocaml" {>= "4.02.0"}
+  "dune"  {>= "2.0.0"}
+  "piqilib"
+  "stdlib-shims"
+  "num" {with-test}
+]
+dev-repo: "git+https://github.com/alavrik/piqi-ocaml"
+
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    "piqi,piqirun"
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+
+install: [
+  ["dune" "install" "-p" "piqi,piqirun"]
+]
+
+url {
+  src: "https://github.com/alavrik/piqi-ocaml/archive/v0.7.8.tar.gz"
+  checksum: "md5=e9bd34d56f33c3fe6cfa133341f96bdf"
+}
diff --git a/packages/piqilib/piqilib.0.6.16/opam b/packages/piqilib/piqilib.0.6.16/opam
new file mode 100644
index 00000000000..32699ad1e42
--- /dev/null
+++ b/packages/piqilib/piqilib.0.6.16/opam
@@ -0,0 +1,36 @@
+opam-version: "2.0"
+synopsis:
+  "The Piqi library -- runtime support for multi-format Protobuf/JSON/XML/Piq data serialization and conversion"
+authors: "Anton Lavrik <alavrik@piqi.org>"
+maintainer: "Anton Lavrik <alavrik@piqi.org>"
+homepage: "http://piqi.org"
+license: "Apache-2.0"
+bug-reports: "https://github.com/alavrik/piqi/issues"
+depends: [
+  "ocaml" {>= "4.03"  & < "4.14.0"}
+  "dune" {>= "2.0.0"}
+  "easy-format"
+  "sedlex" {>= "2.0" & < "3.0"}
+  "xmlm"
+  "base64" {>= "3.1.0"}
+]
+dev-repo: "git+https://github.com/alavrik/piqi"
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+
+url {
+  src: "https://github.com/alavrik/piqi/archive/v0.6.16.tar.gz"
+  checksum: "md5=33121fae570f0949426bab875c809b78"
+}