sage: add list of past test failures

pkgs/applications/science/math/sage/dist-tests.nix

@@ -0,0 +1,17 @@
+# Lists past failures and files associated with it. The intention is to build
+# up a subset of a testsuite that catches 95% of failures that are relevant for
+# distributions while only taking ~5m to run. This in turn makes it more
+# reasonable to re-test sage on dependency changes and makes it easier for
+# users to override the sage derivation.
+# This is an experiment for now. If it turns out that there really is a small
+# subset of files responsible for the vast majority of packaging tests, we can
+# think about moving this upstream.
+[
+	"src/sage/env.py" # [1]
+	"src/sage/misc/persist.pyx" # [1]
+	"src/sage/misc/inline_fortran.py" # [1]
+	"src/sage/repl/ipython_extension.py" # [1]
+]
+
+# Numbered list of past failures to annotate files with
+# [1] PYTHONPATH related issue https://github.com/NixOS/nixpkgs/commit/ec7f569211091282410050e89e68832d4fe60528