diff --git a/packages/why3-coq/why3-coq.1.8.2/opam b/packages/why3-coq/why3-coq.1.8.2/opam
new file mode 100644
index 000000000000..6183b097e48f
--- /dev/null
+++ b/packages/why3-coq/why3-coq.1.8.2/opam
@@ -0,0 +1,67 @@
+opam-version: "2.0"
+maintainer: "guillaume.melquiond@inria.fr"
+authors: [
+  "François Bobot"
+  "Jean-Christophe Filliâtre"
+  "Claude Marché"
+  "Guillaume Melquiond"
+  "Andrei Paskevich"
+]
+
+homepage: "https://www.why3.org/"
+license: "LGPL-2.1-only"
+doc: "https://www.why3.org/doc/"
+bug-reports: "https://gitlab.inria.fr/why3/why3/issues"
+dev-repo: "git+https://gitlab.inria.fr/why3/why3.git"
+
+tags: [
+  "deductive"
+  "program verification"
+  "formal specification"
+  "automated theorem prover"
+  "interactive theorem prover"
+]
+
+build: [
+  ["./autogen.sh"] {dev} # when pinning, there might be no configure file
+  ["touch" "configure"]
+  ["./configure"
+   "--prefix" prefix
+   "--disable-why3-lib"
+   "--disable-frama-c"
+   "--disable-ide"
+   "--disable-js-of-ocaml"
+   "--enable-coq-libs"]
+  [make "-j%{jobs}%" "coq"]
+]
+
+install: [make "install-coq"]
+
+depends: [
+  "conf-autoconf" {build & dev}
+  "coq" {>= "8.16" & < "9.0"}
+  "ocaml" {>= "4.09" & < "5.5"}
+  "ocamlfind" {build}
+  "why3" {= version}
+]
+
+depopts: [
+  "coq-flocq" {>= "3.4"}
+]
+
+synopsis: "Why3 environment for deductive program verification"
+
+description: """
+Why3 provides a rich language for specification and programming, called WhyML, and relies on external theorem provers, both automated and interactive, to discharge verification conditions. Why3 comes with a standard library of logical theories (integer and real arithmetic, Boolean operations, sets and maps, etc.) and basic programming data structures (arrays, queues, hash tables, etc.). A user can write WhyML programs directly and get correct-by-construction OCaml programs through an automated extraction mechanism. WhyML is also used as an intermediate language for the verification of C, Java, Rust, and Ada programs.
+
+Why3 is a complete reimplementation of the former Why platform. Among the new features are: numerous extensions to the input language, a new architecture for calling external provers, and a well-designed API, allowing to use Why3 as a software library. An important emphasis is put on modularity and genericity, giving the end user a possibility to easily reuse Why3 formalizations or to add support for a new external prover if wanted.
+
+This package provides the Coq realizations of Why3 theories."""
+
+url {
+  src: "https://why3.gitlabpages.inria.fr/releases/why3-1.8.2.tar.gz"
+  checksum: [
+    "sha256=b7d112edd5bcce6bcce0023d2bc834eb2ae1a1c42d7aea44ffa124d649b50bea"
+    "md5=76244d73d2cdaff1dbae867b60d0aa0d"
+  ]
+}
diff --git a/packages/why3-ide/why3-ide.1.8.2/opam b/packages/why3-ide/why3-ide.1.8.2/opam
new file mode 100644
index 000000000000..364b1bad756e
--- /dev/null
+++ b/packages/why3-ide/why3-ide.1.8.2/opam
@@ -0,0 +1,66 @@
+opam-version: "2.0"
+maintainer: "guillaume.melquiond@inria.fr"
+authors: [
+  "François Bobot"
+  "Jean-Christophe Filliâtre"
+  "Claude Marché"
+  "Guillaume Melquiond"
+  "Andrei Paskevich"
+]
+
+homepage: "https://www.why3.org/"
+license: "LGPL-2.1-only"
+doc: "https://www.why3.org/doc/"
+bug-reports: "https://gitlab.inria.fr/why3/why3/issues"
+dev-repo: "git+https://gitlab.inria.fr/why3/why3.git"
+
+tags: [
+  "deductive"
+  "program verification"
+  "formal specification"
+  "automated theorem prover"
+  "interactive theorem prover"
+]
+
+build: [
+  ["./autogen.sh"] {dev} # when pinning, there might be no configure file
+  ["touch" "configure"]
+  ["./configure"
+   "--prefix" prefix
+   "--disable-why3-lib"
+   "--disable-frama-c"
+   "--disable-coq-libs"
+   "--disable-js-of-ocaml"
+   "--disable-re"
+   "--enable-ocamlfind"
+   "--enable-ide"]
+  [make "-j%{jobs}%" "ide"]
+]
+
+install: [make "install-ide"]
+
+depends: [
+  "conf-autoconf" {build & dev}
+  "ocaml" {>= "4.09" & < "5.5"}
+  "ocamlfind" {build}
+  "why3" {= version}
+  "lablgtk3"
+  "lablgtk3-sourceview3"
+]
+
+synopsis: "Why3 environment for deductive program verification"
+
+description: """
+Why3 provides a rich language for specification and programming, called WhyML, and relies on external theorem provers, both automated and interactive, to discharge verification conditions. Why3 comes with a standard library of logical theories (integer and real arithmetic, Boolean operations, sets and maps, etc.) and basic programming data structures (arrays, queues, hash tables, etc.). A user can write WhyML programs directly and get correct-by-construction OCaml programs through an automated extraction mechanism. WhyML is also used as an intermediate language for the verification of C, Java, Rust, and Ada programs.
+
+Why3 is a complete reimplementation of the former Why platform. Among the new features are: numerous extensions to the input language, a new architecture for calling external provers, and a well-designed API, allowing to use Why3 as a software library. An important emphasis is put on modularity and genericity, giving the end user a possibility to easily reuse Why3 formalizations or to add support for a new external prover if wanted.
+
+This package provides an IDE for Why3."""
+
+url {
+  src: "https://why3.gitlabpages.inria.fr/releases/why3-1.8.2.tar.gz"
+  checksum: [
+    "sha256=b7d112edd5bcce6bcce0023d2bc834eb2ae1a1c42d7aea44ffa124d649b50bea"
+    "md5=76244d73d2cdaff1dbae867b60d0aa0d"
+  ]
+}
diff --git a/packages/why3/why3.1.8.2/opam b/packages/why3/why3.1.8.2/opam
new file mode 100644
index 000000000000..7d426ad01462
--- /dev/null
+++ b/packages/why3/why3.1.8.2/opam
@@ -0,0 +1,89 @@
+opam-version: "2.0"
+maintainer: "guillaume.melquiond@inria.fr"
+authors: [
+  "François Bobot"
+  "Jean-Christophe Filliâtre"
+  "Claude Marché"
+  "Guillaume Melquiond"
+  "Andrei Paskevich"
+]
+
+homepage: "https://www.why3.org/"
+license: "LGPL-2.1-only"
+doc: "https://www.why3.org/doc/"
+bug-reports: "https://gitlab.inria.fr/why3/why3/issues"
+dev-repo: "git+https://gitlab.inria.fr/why3/why3.git"
+
+tags: [
+  "deductive"
+  "program verification"
+  "formal specification"
+  "automated theorem prover"
+  "interactive theorem prover"
+]
+
+build: [
+  ["./autogen.sh"] {dev} # when pinning, there might be no configure file
+  ["touch" "configure"]
+  ["./configure"
+   "--prefix" prefix
+   "--disable-frama-c"
+   "--disable-coq-libs"
+   "--disable-js-of-ocaml"
+   "--disable-re"
+   "--enable-ocamlfind"
+   "--disable-mpfr" {!mlmpfr:installed}
+   "--enable-mpfr" {mlmpfr:installed}
+   "--disable-zip" {!camlzip:installed}
+   "--enable-zip" {camlzip:installed}
+   "--disable-hypothesis-selection" {!ocamlgraph:installed}
+   "--enable-hypothesis-selection" {ocamlgraph:installed}
+   "--disable-stackify" {!ocamlgraph:installed | ocaml:version < "4.12"}
+   "--enable-stackify" {ocamlgraph:installed & ocaml:version >= "4.12"}
+   "--disable-ide"]
+  [make "-j%{jobs}%" "all" "byte"]
+  [make "doc" "stdlibdoc" "apidoc"] {with-doc}
+]
+
+install: [
+  [make "install" "install-lib"]
+  [make "DOCDIR=%{_:doc}%" "install-doc"] {with-doc}
+]
+
+depends: [
+  "conf-autoconf" {build & dev}
+  "ocaml" {>= "4.09" & < "5.5"}
+  "ocamlfind" {build}
+  "menhir" {>= "20200211"}
+  "zarith"
+]
+
+depopts: [
+  "camlzip"
+  "ocamlgraph"
+  "sexplib"
+  "ppx_deriving" {build}
+  "ppx_sexp_conv" {build}
+  "mlmpfr"
+]
+
+conflicts: [
+  "why3-base"
+  "ocamlgraph" {< "1.8.2"}
+  "mlmpfr" {< "4.0.0"}
+]
+
+synopsis: "Why3 environment for deductive program verification"
+
+description: """
+Why3 provides a rich language for specification and programming, called WhyML, and relies on external theorem provers, both automated and interactive, to discharge verification conditions. Why3 comes with a standard library of logical theories (integer and real arithmetic, Boolean operations, sets and maps, etc.) and basic programming data structures (arrays, queues, hash tables, etc.). A user can write WhyML programs directly and get correct-by-construction OCaml or C programs through an automated extraction mechanism. WhyML is also used as an intermediate language for the verification of C, Java, Rust, and Ada programs.
+
+Why3 is a complete reimplementation of the former Why platform. Among the new features are: numerous extensions to the input language, a new architecture for calling external provers, and a well-designed API, allowing to use Why3 as a software library. An important emphasis is put on modularity and genericity, giving the end user a possibility to easily reuse Why3 formalizations or to add support for a new external prover if wanted."""
+
+url {
+  src: "https://why3.gitlabpages.inria.fr/releases/why3-1.8.2.tar.gz"
+  checksum: [
+    "sha256=b7d112edd5bcce6bcce0023d2bc834eb2ae1a1c42d7aea44ffa124d649b50bea"
+    "md5=76244d73d2cdaff1dbae867b60d0aa0d"
+  ]
+}