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+# Backports Elm packages for Elm 0.18 from an older channel of
+# nixpkgs.
+#
+# Elm 0.19 changed the language & package ecosystem completely,
+# essentially requiring a partial rewrite of all Elm apps. However,
+# //fun/gemma uses Elm 0.18 and I don't have time to rewrite it.
+#
+# Since the ABIs of current glibc and the pinned version have diverged
+# too much, we need to build //fun/gemma completely based on a historical
+# nixpkgs version.
+
+{ pkgs, ... }:
+
+(import
+  (pkgs.fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    rev = "14f9ee66e63077539252f8b4550049381a082518";
+    sha256 = "1wn7nmb1cqfk2j91l3rwc6yhimfkzxprb8wknw5wi57yhq9m6lv1";
+  })
+{ })