(use-modules (gnu packages bison)
             (gnu packages flex)
             (gnu packages commencement)
             (gnu packages base)
             (gnu packages gdb)
             (gnu packages python)
             (gnu packages guile)
             (gnu packages pkg-config)
             (gnu packages valgrind))

(packages->manifest
 (list
  bison
  flex
  gcc-toolchain
  gdb
  gnu-make
  guile-next
  pkg-config
  python
  valgrind
  ))