diff --git a/index/gn/gnat/gnat-10.2.0.toml b/index/gn/gnat/gnat-10.2.0.toml
index 149007ba..8aa1ceb1 100644
--- a/index/gn/gnat/gnat-10.2.0.toml
+++ b/index/gn/gnat/gnat-10.2.0.toml
@@ -4,6 +4,8 @@ description = "The GNAT Ada compiler"
 maintainers = ["chouteau@adacore.com"]
 maintainers-logins = ["Fabien-Chouteau"]
 
+auto-gpr-with = false
+
 [environment."case(os)".linux]
 PATH.append = "${CRATE_ROOT}/bin"
 
diff --git a/index/gp/gprbuild/gprbuild-21.0.0.toml b/index/gp/gprbuild/gprbuild-21.0.0.toml
index b9cde7c3..0a60f5a6 100644
--- a/index/gp/gprbuild/gprbuild-21.0.0.toml
+++ b/index/gp/gprbuild/gprbuild-21.0.0.toml
@@ -4,6 +4,8 @@ description = "The GPRBuild Ada/multilanguage build tool"
 maintainers = ["chouteau@adacore.com"]
 maintainers-logins = ["Fabien-Chouteau"]
 
+auto-gpr-with = false
+
 [environment."case(os)".linux]
 PATH.append = "${CRATE_ROOT}/bin"