Signed-off-by: Michał Górny <[email protected]>
---
eclass/distutils-r1.eclass | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index 7dfd92691b59..b4183e010b9c 100644
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -874,6 +874,26 @@ _distutils-r1_backend_to_key() {
setuptools.build_meta|setuptools.build_meta:__legacy__)
echo setuptools
;;
+ flit.buildapi)
+ eerror "flit.buildapi backend is deprecated. Please update upstream:"
+ eerror
+ eerror '-requires = ["flit"]'
+ eerror '+requires = ["flit_core"]'
+ eerror '-build-backend = "flit.buildapi"'
+ eerror '+build-backend = "flit_core.buildapi"'
+ eerror
+ die "flit.buildapi is deprecated, use flit_core instead"
+ ;;
+ poetry.masonry.api)
+ eerror "poetry.masonry.api backend is deprecated. Please update upstream:"
+ eerror
+ eerror '-requires = ["poetry"]'
+ eerror '+requires = ["poetry-core>=1.0.0"]'
+ eerror '-build-backend = "poetry.m