diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 95d858598a3..bfc62816a69 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -3792,33 +3792,34 @@ supports the propositional fragment of PDDL2.2.")
            libxft
            python))
     (arguments
-     `(#:configure-flags `("-DENABLE_SYSTEM_CONTRIB:BOOL=ON"
-                           "-DENABLE_BUILD_SHARED:BOOL=ON"
-                           "-DENABLE_BUILD_DYNAMIC:BOOL=ON")
-       #:imported-modules (,@%cmake-build-system-modules
-                           (guix build python-build-system))
-       #:modules (((guix build python-build-system) #:select (site-packages))
-                  (guix build cmake-build-system)
-                  (guix build utils))
-       #:phases
-       (modify-phases %standard-phases
-         (add-after 'unpack 'patch-paths
-           (lambda* (#:key inputs outputs #:allow-other-keys)
-             ;; Use the standard Guix site-package path for
-             ;; installation of the Python API.
-             (substitute* "CMakeLists.txt"
-               (("include\\(GNUInstallDirs\\)\n")
-                (string-append "include(GNUInstallDirs)\n"
-                               "  set(GMSH_PY_LIB "
-                               (site-packages inputs outputs) ")\n"))
-               (("\\$\\{GMSH\\_PY\\} DESTINATION \\$\\{GMSH\\_LIB\\}")
-                "${GMSH_PY} DESTINATION ${GMSH_PY_LIB}"))
-             ;; Find the shared library.
-             (let ((libgmsh (string-append (assoc-ref outputs "out")
-                                           "/lib/libgmsh.so")))
-               (substitute* "api/gmsh.py"
-                 (("find_library\\(\"gmsh\"\\)")
-                  (simple-format #f "\"~a\"" libgmsh)))))))))
+     (list #:configure-flags
+           #~(list "-DENABLE_SYSTEM_CONTRIB:BOOL=ON"
+                   "-DENABLE_BUILD_SHARED:BOOL=ON"
+                   "-DENABLE_BUILD_DYNAMIC:BOOL=ON")
+           #:imported-modules `(,@%cmake-build-system-modules
+                                (guix build python-build-system))
+           #:modules '(((guix build python-build-system) #:select (site-packages))
+                       (guix build cmake-build-system)
+                       (guix build utils))
+           #:phases
+           #~(modify-phases %standard-phases
+               (add-after 'unpack 'patch-paths
+                 (lambda* (#:key inputs outputs #:allow-other-keys)
+                   ;; Use the standard Guix site-package path for
+                   ;; installation of the Python API.
+                   (substitute* "CMakeLists.txt"
+                     (("include\\(GNUInstallDirs\\)\n")
+                      (string-append "include(GNUInstallDirs)\n"
+                                     "  set(GMSH_PY_LIB "
+                                     (site-packages inputs outputs) ")\n"))
+                     (("\\$\\{GMSH\\_PY\\} DESTINATION \\$\\{GMSH\\_LIB\\}")
+                      "${GMSH_PY} DESTINATION ${GMSH_PY_LIB}"))
+                   ;; Find the shared library.
+                   (let ((libgmsh (string-append #$output
+                                                 "/lib/libgmsh.so")))
+                     (substitute* "api/gmsh.py"
+                       (("find_library\\(\"gmsh\"\\)")
+                        (simple-format #f "\"~a\"" libgmsh)))))))))
     (home-page "https://gmsh.info/")
     (synopsis "3D finite element grid generator")
     (description "Gmsh is a 3D finite element grid generator with a built-in