diff --git a/hydra/artiq.json b/hydra/artiq.json
index cceb799..702da1f 100644
--- a/hydra/artiq.json
+++ b/hydra/artiq.json
@@ -46,7 +46,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.03", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "artiqSrc": { "type": "git", "value": "git://github.com/m-labs/artiq.git release-5 1", "emailresponsible": false }
         }
@@ -63,7 +63,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.03", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "sinaraSystemsSrc": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/sinara-systems.git master 1", "emailresponsible": false },
             "artiq-fast": { "type": "sysbuild", "value": "artiq:fast:generated-nix", "emailresponsible": false }