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diff --git a/guix/forge/acme.scm b/guix/forge/acme.scm
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+;;; guix-forge --- Guix software forge meta-service
+;;; Copyright © 2023 Arun Isaac <arunisaac@systemreboot.net>
+;;;
+;;; This file is part of guix-forge.
+;;;
+;;; guix-forge is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published
+;;; by the Free Software Foundation, either version 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; guix-forge is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with guix-forge.  If not, see
+;;; <https://www.gnu.org/licenses/>.
+
+(define-module (forge acme)
+  #:use-module ((gnu packages autotools) #:select (autoconf automake))
+  #:use-module ((gnu packages curl) #:select (curl))
+  #:use-module ((gnu packages documentation) #:select (asciidoc))
+  #:use-module ((gnu packages pkg-config) #:select (pkg-config))
+  #:use-module ((gnu packages tls) #:select (gnutls))
+  #:use-module (guix build-system gnu)
+  #:use-module (guix gexp)
+  #:use-module (guix git-download)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages))
+
+(define-public uacme
+  (package
+    (name "uacme")
+    (version "1.7.4")
+    (source (origin
+              ;; TODO: Unbundle libev.
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/ndilieto/uacme/")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1jhjyjnrfq07qgslmz1qpka1ahnmpya2garbxldkh2fr0bmsn26b"))))
+    (build-system gnu-build-system)
+    (arguments
+     (list #:phases
+           #~(modify-phases %standard-phases
+               (add-after 'unpack 'set-version
+                 (lambda _
+                   (substitute* "configure.ac"
+                     (("m4_esyscmd\\(\\[build-aux/git-version-gen \\.tarball-version\\]\\)")
+                      #$version)))))))
+    (inputs
+     (list curl gnutls))
+    (native-inputs
+     (list asciidoc autoconf automake pkg-config))
+    (home-page "https://github.com/ndilieto/uacme")
+    (synopsis "Minimal ACMEv2 client written in C")
+    (description "uacme is a lightweight client for the RFC8555 ACMEv2
+protocol, written in plain C with minimal dependencies.  The ACMEv2
+protocol allows a Certificate Authority such as Let's Encrypt and an
+applicant to automate the process of verification and certificate
+issuance.
+
+uacme calls an external hook program with the tokens required for
+domain authorization.  The hook program can be an executable, shell
+script, perl script, python script, or any file that the operating
+system can execute.
+
+uacme is ACME challenge agnostic.  It provides the user or hook
+program with all tokens and information required to complete any
+challenge type but leaves the task of setting up and cleaning up the
+challenge environment to the user or hook.
+
+uacme also includes ualpn, a lightweight proxying tls-alpn-01
+challenge responder compliant with RFC8737 and RFC8738.")
+    (license license:gpl3+)))