Copypasta of the relevant log (/var/log/guix/drvs/pr/nl8g1ky1z3l3dfp4llh50w5qzd2qz4-webkitgtk- 2.34.1.drv.bz2):
-- Checking for module 'egl' -- Found egl, version 20.2.4 -- Found EGL: /gnu/store/jf269s6clr6r57p8v5c3c1qkyra6apq2-mesa- 20.2.4/include -- Checking for module 'gl' -- Found gl, version 20.2.4 -- Found OpenGL: /gnu/store/jf269s6clr6r57p8v5c3c1qkyra6apq2-mesa- 20.2.4/include -- Looking for include file GL/glx.h -- Looking for include file GL/glx.h - found -- Checking for module 'glesv2' -- Found glesv2, version 20.2.4 -- Found OpenGLES2: /gnu/store/jf269s6clr6r57p8v5c3c1qkyra6apq2-mesa- 20.2.4/lib/libGLESv2.so (found version "3.2") -- Checking for module 'gtk+-3.0' -- Found gtk+-3.0, version 3.24.24 -- Checking for module 'gtk+-unix-print-3.0' -- Found gtk+-unix-print-3.0, version 3.24.24 -- Found GTK: 3.24.24 (Required is at least version "3.22.0") -- Could NOT find LibSoup: Found unsuitable version "", but required is at least "2.99.9" (found LIBSOUP_INCLUDE_DIRS-NOTFOUND) CMake Error at Source/cmake/OptionsGTK.cmake:212 (message): libsoup 3 is required. Enable USE_SOUP2 to use libsoup 2 (disables HTTP/2) Call Stack (most recent call first): Source/cmake/WebKitCommon.cmake:220 (include) CMakeLists.txt:20 (include) -- Configuring incomplete, errors occurred! See also "/tmp/guix-build-webkitgtk-2.34.1.drv- 0/build/CMakeFiles/CMakeOutput.log". See also "/tmp/guix-build-webkitgtk-2.34.1.drv- 0/build/CMakeFiles/CMakeError.log". command "cmake" "../webkitgtk-2.34.1" "-DCMAKE_BUILD_TYPE=Release" "- DCMAKE_INSTALL_PREFIX=/gnu/store/4vchdgd2c3kvgyf8s9z54985vf80gsaa- webkitgtk-2.34.1" "-DCMAKE_INSTALL_LIBDIR=lib" "- DCMAKE_INSTALL_RPATH_USE_LINK_PATH=TRUE" "- DCMAKE_INSTALL_RPATH=/gnu/store/4vchdgd2c3kvgyf8s9z54985vf80gsaa- webkitgtk-2.34.1/lib" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DPORT=GTK" "- DENABLE_GTKDOC=ON" "-DENABLE_GAMEPAD=OFF" "-DUSE_SYSTEMD=OFF" "- DLIB_INSTALL_DIR=/gnu/store/4vchdgd2c3kvgyf8s9z54985vf80gsaa-webkitgtk- 2.34.1/lib" "-DUSE_GSTREAMER_GL=OFF" failed with status 1
