diff --git a/hosts/known-hosts.toml b/hosts/known-hosts.toml
index 9a5eeb2..3c40cb3 100644
--- a/hosts/known-hosts.toml
+++ b/hosts/known-hosts.toml
@@ -182,7 +182,8 @@ ssh.proxyJump = "isvegg.pvv.ntnu.no"
 
 ["darwin-build-box.nix-community.org"] # https://nix-community.org/community-builder/
 buildMachine.systems = [ "aarch64-darwin", "x86_64-darwin" ] # macOS 14.6.1
-buildMachine.maxJobs = 2 # 8 cores 24GB - M2
+buildMachine.maxJobs = 2 # 8 cores 24GB
+buildMachine.speedFactor = 4 # M2
 buildMachine.supportedFeatures = [ "big-parallel" ]
 ssh.listenUser = "pbsds"
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFz8FXSVEdf8FvDMfboxhB5VjSe7y2WgSa09q1L4t099"
@@ -190,7 +191,8 @@ ssh.userPrivateKey = "/run/secrets/nix-community-builders-ssh-key"
 
 ["aarch64.nixos.community"] # https://github.com/NixOS/aarch64-build-box
 buildMachine.systems = [ "aarch64-linux" ]
-buildMachine.maxJobs = 4 # 64 threads?
+buildMachine.maxJobs = 4 # 80 threads 256GB
+buildMachine.speedFactor = 4 # Neoverse-N1
 buildMachine.supportedFeatures = [ "big-parallel", "kvm", "nixos-test" ]
 ssh.listenUser = "pbsds"
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMUTz5i9u5H2FHNAmZJyoJfIGyUm/HfGhfwnc142L3ds"