Changing a project's meson options depending on buildtype

[carnivorecookies]

Hello,
So I have the following meson.build file:

beetroot_opts = ['buildtype=release', 'warning_level=3', 'c_std=c23']
beetroot_version = '0.4.0'
compiler = meson.get_compiler('c')

if get_option('buildtype') == 'debug'
  # Note how I change beetroot_opts depending on buildtype
  beetroot_opts += '-b_sanitize=address,undefined'
  beetroot_opts += '-b_sanitize=leak'

  if compiler.has_argument('-fsanitize=bounds')
    add_global_arguments('-fsanitize=bounds')
    add_global_link_arguments('-fsanitize=bounds')
  endif
  if compiler.has_argument('-fsanitize=integer')
    add_global_arguments('-fsanitize=integer')
    add_global_link_arguments('-fsanitize=integer')
  endif
endif


project('beetroot', 'c',
  version: beetroot_version,
  include_directores = 'xmem',
  default_options: beetroot_opts)

crypt = dependency('crypt', required: true)

beetroot_src = [
  'src/main.c',
  'src/password.c',
  'src/security.c',
  'xmem/internal/xalloc.c',
  'xmem/internal/xexit.c',
  'xmem/internal/xmemdup.c',
  'xmem/internal/xmemset.c',
  'xmem/internal/xstrdup.c',
]

beetroot_include = [
  include_directories('src'),
  include_directories('xmem'),
]

executable('beetroot',
  beetroot_src,
  dependencies: crypt,
  include_directories: beetroot_include,
  install: true)

as you can see, i want a way to add meson options depending on if the buildtype is debug. however, this requires me to have an array of meson options. is there a different way that I could do the dynamic options part?

[carnivorecookies]

Sorry I should've clarified as to why this doesn't work:

$ meson setup build
The Meson build system
Version: 1.7.0
Source dir: /home/capy/Documents/beetroot
Build dir: /home/capy/Documents/beetroot/build
Build type: native build

ERROR: Invalid source tree: first statement must be a call to project()