Pin avr-gcc in shell.nix pending release of 8.3.0 (#3922)

* Pin avr-gcc in shell.nix pending release of 8.3.0

There's apparently a critical bug in 8.2.0, which is now the nixpkgs default. This change overrides that default in favor of the known good version. Once 8.3.0 is the default, the override can be dropped.

* Arch/Manjaro fix

1 files changed, 7 insertions, 0 deletions

diff --git a/shell.nix b/shell.nix
index 715414f96..67efb46b7 100644
--- a/shell.nix
+++ b/shell.nix
@@ -13,6 +13,13 @@ let
     "-B${avrlibc}/avr/lib/avr51"
     "-L${avrlibc}/avr/lib/avr51"
   ];
+  avrgcc = pkgs.avrgcc.overrideAttrs (oldAttrs: rec {
+    name = "avr-gcc-8.1.0";
+    src = fetchurl {
+      url = "mirror://gcc/releases/gcc-8.1.0/gcc-8.1.0.tar.xz";
+      sha256 = "0lxil8x0jjx7zbf90cy1rli650akaa6hpk8wk8s62vk2jbwnc60x";
+    };
+  });
 in
 
 stdenv.mkDerivation {