force extended-tests re-run

main.nix

@@ -27,7 +27,7 @@ let
   generateTestOkHash = pkgs.runCommand "generate-test-ok-hash" { buildInputs = [ pkgs.nix ]; }
     ''
     TMPDIR=`mktemp -d`
-    cp ${generatedNix}/pkgs/artiq-version.nix $TMPDIR/passed8
+    cp ${generatedNix}/pkgs/artiq-version.nix $TMPDIR/passed9
     HASH=`nix-hash --type sha256 --base32 $TMPDIR`
     echo \"$HASH\" > $out
     '';
@@ -96,7 +96,11 @@ in
       LOCKCTL=$(mktemp -d)
       mkfifo $LOCKCTL/lockctl
 
-      cat $LOCKCTL/lockctl | ${pkgs.openssh}/bin/ssh rpi-1 'flock /tmp/board_lock-kc705-1 -c "echo Ok; cat"' | (
+      cat $LOCKCTL/lockctl | ${pkgs.openssh}/bin/ssh \
+        -o UserKnownHostsFile=$HOME/.ssh/known_hosts \
+        rpi-1 \
+        'flock /tmp/board_lock-kc705-1 -c "echo Ok; cat"' \
+      | (
         # End remote flock via FIFO
         atexit_unlock() {
           echo > $LOCKCTL/lockctl
@@ -119,7 +123,7 @@ in
       )
 
       mkdir $out
-      cp ${generatedNix}/pkgs/artiq-version.nix $out/passed8
+      cp ${generatedNix}/pkgs/artiq-version.nix $out/passed9
       '';
     };
   }