diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index e87c6bc0b4..17fbd9de9e 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -131,6 +131,7 @@
 ;;; Copyright © 2022 Mathieu Laparie <mlaparie@disr.it>
 ;;; Copyright © 2022 Garek Dyszel <garekdyszel@disroot.org>
 ;;; Copyright © 2022 Baptiste Strazzulla <bstrazzull@hotmail.fr>
+;;; Copyright © 2022 Nicolas Graves <ngraves@ngraves.fr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -159,6 +160,7 @@ (define-module (gnu packages python-xyz)
   #:use-module (gnu packages check)
   #:use-module (gnu packages cmake)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages cpp)
   #:use-module (gnu packages crypto)
   #:use-module (gnu packages databases)
   #:use-module (gnu packages dbm)
@@ -4634,6 +4636,73 @@ (define-public autokey
 flexibility and power of the Python language.")
     (license license:gpl3+)))
 
+(define-public python-dm-tree
+  (package
+    (name "python-dm-tree")
+    (version "0.1.7")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "dm-tree" version))
+              (sha256
+               (base32 "0apxfxgmqh22qpk92zmmf3acqkavhwxz78lnwz026a5rlnncizih"))))
+    (build-system python-build-system)
+    (inputs (list pybind11 abseil-cpp python))
+    (propagated-inputs (list python-wheel
+                             python-absl-py
+                             python-attrs
+                             python-numpy
+                             python-wrapt))
+    (arguments
+     (list #:tests? #f
+           #:phases
+           #~(modify-phases %standard-phases
+               (add-before 'build 'build-shared-lib
+                 (lambda _
+                   (let* ((pybind11   #$(this-package-input "pybind11"))
+                          (python     #$(this-package-input "python"))
+                          (version    (python-version python))
+                          (abseil-cpp #$(this-package-input "abseil-cpp")))
+                     ;; Delete default cmake build.
+                     (substitute* "setup.py"
+                       (("ext_modules.*") "")
+                       (("cmdclass.*") ""))
+                     ;; Actual build phase.
+                     (mkdir-p "build/temp/tree/")
+                     (invoke
+                      "gcc" "-pthread" "-Wno-unused-result" "-Wsign-compare"
+                      "-DNDEBUG" "-g" "-fwrapv" "-O3" "-Wall"
+                      "-fno-semantic-interposition" "-fPIC"
+                      "-I" (string-append pybind11
+                                          "/lib/python" version
+                                          "/site-packages/pybind11/include")
+                      "-I" (string-append python "/include/python"
+                                          version)
+                      "-I" (string-append abseil-cpp "/include")
+                      "-c" "tree/tree.cc"
+                      "-o" "build/temp/tree/tree.o"
+                      "-fvisibility=hidden" "-g0")
+                     (mkdir-p "build/lib/tree")
+                     (invoke
+                      "g++" "-pthread" "-shared"
+                      (string-append "-Wl," "-rpath=" python "/lib")
+                      "-fno-semantic-interposition"
+                      "build/temp/tree/tree.o"
+                      "-L" (string-append python "/lib")
+                      "-L" (string-append abseil-cpp "/lib")
+                      "-l" "absl_int128"
+                      "-l" "absl_raw_hash_set"
+                      "-l" "absl_raw_logging_internal"
+                      "-l" "absl_strings"
+                      "-l" "absl_throw_delegate"
+                      "-o" "build/lib/tree/_tree.so")))))))
+    (home-page "https://github.com/deepmind/tree")
+    (synopsis "Work with nested data structures in Python")
+    (description "Tree is a python library for working with nested data
+structures.  In a way, @code{tree} generalizes the builtin @code{map} function
+which only supports flat sequences, and allows you to apply a function to each
+leaf preserving the overall structure.")
+    (license license:asl2.0)))
+
 (define-public python-docutils
   (package
     (name "python-docutils")