diff --git a/profiles/known-hosts/hosts.toml b/profiles/known-hosts/hosts.toml
index 327c547..1b1dcb0 100644
--- a/profiles/known-hosts/hosts.toml
+++ b/profiles/known-hosts/hosts.toml
@@ -47,7 +47,7 @@ aliases = [ "bolle.tail9aac63.ts.net" ]
 buildMachine.systems = ["x86_64-linux", "i686-linux", "riscv64-linux"]
 buildMachine.maxJobs = 3 # 12 threads 32GB
 buildMachine.speedFactor = 4 # ???
-buildMachine.supportedFeatures = ["kvm", "big-parallel", "nixos-test"]
+buildMachine.supportedFeatures = ["kvm", "nixos-test"]
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILeOB/57N1fQPVorIUlkkJZaQduBo+4+km2Qbj4ebd/k"
 ssh.proxyJump = "hildring.pvv.ntnu.no"
 # wakeonlan e4:54:e8:51:8c:e9
@@ -57,7 +57,7 @@ aliases = [ "eple.tail9aac63.ts.net" ]
 buildMachine.systems = ["x86_64-linux", "i686-linux", "riscv64-linux"]
 buildMachine.maxJobs = 3 # 12 threads 32GB
 buildMachine.speedFactor = 3 # i7-5820K
-buildMachine.supportedFeatures = ["kvm", "big-parallel", "nixos-test"]
+buildMachine.supportedFeatures = ["kvm", "nixos-test"]
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH03MEINNnjBvtmvN2QsCDCLkvF9ow5FQJp9uiyQ1Iwi"
 ssh.proxyJump = "hildring.pvv.ntnu.no"
 # wakeonlan 4c:cc:6a:05:51:01
@@ -67,7 +67,7 @@ aliases = [ "garp.tail9aac63.ts.net" ]
 buildMachine.systems = ["x86_64-linux", "i686-linux", "riscv64-linux"]
 buildMachine.maxJobs = 2 # 8 threads 32GB
 buildMachine.speedFactor = 4 # i7-6700
-buildMachine.supportedFeatures = ["kvm", "big-parallel", "nixos-test", "cuda"]
+buildMachine.supportedFeatures = ["kvm", "nixos-test", "cuda"]
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOkcZ3cUAKk8uUvZPsX7PDBInkb3Eps3Xh+xVrhPY+sx"
 ssh.proxyJump = "hildring.pvv.ntnu.no"
 # wakeonlan 4c:cc:6a:61:d0:20
@@ -106,6 +106,7 @@ ssh.userPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINnS1TmV9q7n+s7+RouuB6v
 buildMachine.speedFactor = 5 # i7-11800H
 ssh.listenUser = "pbsds"
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGDuWdqEQ5mmVjuKi6f/Q2PFxuqB3URpgTHid06Vw7we"
+ssh.userPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJCbXQ2q/cCe2wgUT4d0qH6N3Ef7k3WgLCxeqfdk7sDc root@rocm"
 # wakeonlan 08:8f:c3:2b:da:8d
 # wakeonlan c4:41:1e:67:ed:54 dock
 # wakeonlan f4:7b:09:89:bd:1d wireless
@@ -165,12 +166,14 @@ ssh.listenPublicKey = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIb
 ssh.listenUser = "pederbs"
 ssh.listenPublicKey = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEq0yasKP0mH6PI6ypmuzPzMnbHELo9k+YB5yW534aKudKZS65YsHJKQ9vapOtmegrn5MQbCCgrshf+/XwZcjbM="
 
-
+# can be used with
+# --builders "@/etc/nix/machines; ssh://pederbs@heid.idi.ntnu.no x86_64-linux - 24 5 big-parallel - -"
 ["heid.idi.ntnu.no"]
-# buildMachine.maxJobs = 24 # 96 threads 1.4TB
+#buildMachine.maxJobs = 24 # 96 threads 1.4TB
+buildMachine.maxJobs = 4 # 96 threads 1.4TB -> 24 cores per big-parallel job
 buildMachine.speedFactor = 5 # Intel Xeon Platinum 8168 CPU @ 2.70GHz
 buildMachine.supportedFeatures = [ "big-parallel" ]
-# buildMachine.mandatoryFeatures = [ "big-parallel" ]
+buildMachine.mandatoryFeatures = [ "big-parallel" ]
 ssh.listenUser = "pederbs"
 ssh.listenPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHzLWPq7O9OiUXEDtwm/xfdBmLqEZXWlXDdRuJmb2Gou"
 ssh.proxyJump = "hildring.pvv.ntnu.no"