Index: .github/workflows/build.yml
===================================================================
diff -u -r72fcc443795dbc7383276e587ddc4606b6875c52 -r24542a2eef5724b7594c96a1f95d0402b8629083
--- .github/workflows/build.yml	(.../build.yml)	(revision 72fcc443795dbc7383276e587ddc4606b6875c52)
+++ .github/workflows/build.yml	(.../build.yml)	(revision 24542a2eef5724b7594c96a1f95d0402b8629083)
@@ -63,10 +63,6 @@
             experimental: [true]
           - os: macos-latest
             compiler: gcc-12
-            tcltag: core-8-5-19
-            experimental: [false]
-          - os: macos-latest
-            compiler: gcc-12
             tcltag: core-8-6-15
             experimental: [false]
           - os: macos-latest
@@ -75,10 +71,6 @@
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
-            tcltag: core-8-5-19
-            experimental: [false]
-          - os: ubuntu-latest
-            compiler: gcc-10
             tcltag: core-8-6-15
             experimental: [false]
           - os: ubuntu-latest