diff --git a/index/gn/gnoga/gnoga-2.1.2.toml b/index/gn/gnoga/gnoga-2.1.2.toml
index 0aa003df8..f20932698 100644
--- a/index/gn/gnoga/gnoga-2.1.2.toml
+++ b/index/gn/gnoga/gnoga-2.1.2.toml
@@ -12,11 +12,6 @@ licenses = "GPL-3.0-only WITH GCC-exception-3.1"
 
 project-files = ["lib_gnoga.gpr"]
 
-[gpr-set-externals.'case(os)']
-linux   = { Target_OS = "Linux", PRJ_TARGET = "Linux" }
-windows = { Target_OS = "Windows", PRJ_TARGET = "Windows" }
-macos   = { Target_OS = "OSX", PRJ_TARGET = "OSX" }
-
 [[depends-on]]
 gnat = ">=2021 | (>=12 & <2000)"
 simple_components = "^4.62.0"
diff --git a/index/si/simple_components/simple_components-4.68.0.toml b/index/si/simple_components/simple_components-4.68.0.toml
index 6c9ca76a2..e40ba303d 100644
--- a/index/si/simple_components/simple_components-4.68.0.toml
+++ b/index/si/simple_components/simple_components-4.68.0.toml
@@ -21,9 +21,6 @@ Target_OS = ["Windows", "Windows_NT", "Linux", "UNIX", "OSX", "FreeBSD", "auto"]
 Tasking = ["Multiple", "Single"] # Default Multiple
 Traced_Objects = ["Off", "On"] # Default Off
 
-[gpr-set-externals]
-Target_OS = "auto"
-
 [gpr-set-externals."case(os)".linux]
 odbc = "unixODBC"
 [gpr-set-externals."case(os)".windows]