led: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f29-build-16483-8042/root/ /var/lib/mock/f29-build-16483-8042/root//builddir/build/SRPMS/xviewer-plugins-1.2.0-7.fc29.src.rpm
Last metadata expiration check: 0:00:03 ago on Wed 04 Jul 2018 08:14:05 AM UTC.
Error: 
 Problem 1: package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 2: package libpeas-devel-1.22.0-7.fc29.riscv64 requires pkgconfig(gobject-introspection-1.0) >= 1.39.0, but none of the providers can be installed
  - package gobject-introspection-devel-1.56.1-1.fc29.riscv64 requires python3-mako, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-mako-1.0.6-10.fc29.noarch
 Problem 3: package python3-devel-3.6.5-4.0.riscv64.fc29.riscv64 requires python3 = 3.6.5-4.0.riscv64.fc29, but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 4: package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package libchamplain-devel-0.12.16-2.fc29.riscv64 requires pkgconfig(glib-2.0), but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 5: package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package gtk3-devel-3.22.30-1.fc29.riscv64 requires pkgconfig(gio-2.0) >= 2.49.4, but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 6: package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package libgdata-devel-0.17.9-2.fc29.riscv64 requires pkgconfig(gobject-2.0), but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 7: package clutter-devel-1.26.2-6.fc29.riscv64 requires pkgconfig(gio-2.0) >= 2.44.0, but none of the providers can be installed
  - package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package clutter-gtk-devel-1.8.4-3.fc29.riscv64 requires pkgconfig(clutter-1.0), but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch
 Problem 8: package gtk3-devel-3.22.30-1.fc29.riscv64 requires pkgconfig(gio-2.0) >= 2.49.4, but none of the providers can be installed
  - package glib2-devel-2.56.1-4.fc29.riscv64 requires /usr/bin/python3, but none of the providers can be installed
  - package xviewer-devel-1.8.0-2.fc29.riscv64 requires pkgconfig(gtk+-3.0), but none of the providers can be installed
  - package python3-3.6.5-4.0.riscv64.fc29.riscv64 requires python3-pip, but none of the providers can be installed
  - conflicting requests
  - nothing provides python(abi) = 3.7 needed by python3-pip-9.0.3-5.fc29.noarch