diff --git a/artiq/windows/default.nix b/artiq/windows/default.nix
index 4cd5987..2e37569 100644
--- a/artiq/windows/default.nix
+++ b/artiq/windows/default.nix
@@ -3,93 +3,60 @@
   qemuMem ? "2G",
   testTimeout ? 180,
   artiqPkg ? import ../conda-artiq.nix { inherit pkgs; },
+  testCommand ? "python -m unittest discover -v artiq.test",
 }:
 
 with pkgs;
 
 let
-  artiqSrc = <artiqSrc>;
-  artiqVersion =
-    pkgs.runCommand "artiq-version" {
-      buildInputs = [ pkgs.nix pkgs.git ];
-    } ''
-      REV=`git --git-dir ${artiqSrc}/.git rev-parse HEAD`
-      echo \"5e.`cut -c1-8 <<< $REV`\" > $out
-    '';
-
-  generateTestOkHash =
-    pkgs.runCommand "generate-test-ok-hash" {
-      buildInputs = [ pkgs.nix ];
-    } ''
-      TMPDIR=`mktemp -d`
-      cp ${artiqVersion} $TMPDIR/passed
-      HASH=`nix-hash --type sha256 --base32 $TMPDIR`
-      echo \"$HASH\" > $out
-    '';
-
+  escape = builtins.replaceStrings [ "\\" ] [ "\\\\" ];
   qemu = import ./qemu.nix {
     inherit pkgs qemuMem;
     diskImage = "c.img";
   };
-  ssh = qemu.ssh;
+  # Double-escape because we produce a script from a shell heredoc
+  ssh = cmd: qemu.ssh (escape cmd);
   scp = qemu.scp;
   condaEnv = "artiq";
+in
 
-  makeTest = name: testCommand:
-    stdenv.mkDerivation {
-      name = "windows-test-conda-artiq-${name}";
+stdenv.mkDerivation {
+  name = "windows-test-runner";
+  src = ./.;
 
-      outputHashAlgo = "sha256";
-      outputHashMode = "recursive";
-      outputHash = import generateTestOkHash;
-      __hydraRetry = false;
+  buildInputs = qemu.inputs;
+  dontBuild = true;
+  installPhase = ''
+    mkdir -p $out/bin
+    cat > $out/bin/run.sh << EOF
+    # +1 day from last modification of the disk image
+    CLOCK=$(date -Is -d @$(expr $(stat -c %Y ${diskImage}) + 86400))
+    ${qemu.runQemu true [
+      "-boot" "order=c"
+      "-snapshot"
+      "-drive" "file=${diskImage},index=0,media=disk,cache=unsafe"
+      "-rtc" "base=$CLOCK"
+      "-display" "none"
+    ]} &
 
-      phases = [ "buildPhase" ];
-      buildInputs = qemu.inputs;
-      buildPhase = ''
-        # +1 day from last modification of the disk image
-        CLOCK=$(date -Is -d @$(expr $(stat -c %Y ${diskImage}) + 86400))
-        ${qemu.runQemu true [
-          "-boot" "order=c"
-          "-snapshot"
-          "-drive" "file=${diskImage},index=0,media=disk,cache=unsafe"
-          "-rtc" "base=$CLOCK"
-          "-display" "none"
-        ]} &
+    echo "Wait for Windows to boot"
+    sleep 10
+    ${ssh "ver"}
+    for pkg in ${artiqPkg}/noarch/artiq*.tar.bz2 ; do
+      ${scp "\$pkg" "artiq.tar.bz2"}
+      ${ssh "anaconda\\scripts\\activate ${condaEnv} && conda install artiq.tar.bz2"}
+    done
 
-        echo "Wait for Windows to boot"
-        sleep 10
-        ${ssh "ver"}
-        for pkg in ${artiqPkg}/noarch/artiq*.tar.bz2 ; do
-          ${scp "\$pkg" "artiq.tar.bz2"}
-          ${ssh "anaconda\\scripts\\activate ${condaEnv} && conda install artiq.tar.bz2"}
-        done
+    # Allow tests to run for 2 minutes
+    ${ssh "shutdown -s -t ${toString testTimeout}"}
 
-        # Allow tests to run for 2 minutes
-        ${ssh "shutdown -s -t ${toString testTimeout}"}
+    ${ssh "anaconda\\scripts\\activate ${condaEnv} && ${testCommand}"}
 
-        ${testCommand}
-
-        # Abort timeouted shutdown
-        ${ssh "shutdown -a"}
-        # Power off immediately
-        ${ssh "shutdown -p -f"}
-
-        mkdir $out
-        cp ${artiqVersion} $out/passed
-      '';
-    };
-in {
-  standalone =
-    makeTest "standalone"
-    (ssh "anaconda\\scripts\\activate ${condaEnv} && python -m unittest discover -v artiq.test");
-  kc705 =
-    makeTest "kc705"
-    # This weirdly mangled syntax is legit for Windows
-    (ssh (builtins.replaceStrings [ "\n" ] [ "" ] ''
-      anaconda\scripts\activate ${condaEnv}
-      && set ARTIQ_ROOT=%cd%\anaconda\envs\artiq-env\Lib\site-packages\artiq\examples\kc705_nist_clock
-      && set ARTIQ_LOW_LATENCY=1
-      && python -m unittest discover -v artiq.test.coredevice
-    ''));
+    # Abort timeouted shutdown
+    ${ssh "shutdown -a"}
+    # Power off immediately
+    ${ssh "shutdown -p -f"}
+    EOF
+    chmod a+x $out/bin/run.sh
+  '';
 }
diff --git a/artiq/windows/install.nix b/artiq/windows/install.nix
index 680bb6f..3bce92b 100644
--- a/artiq/windows/install.nix
+++ b/artiq/windows/install.nix
@@ -15,12 +15,13 @@ let
     sha256 = "1f9icm5rwab6l1f23a70dw0qixzrl62wbglimip82h4zhxlh3jfj";
   };
 
+  escape = builtins.replaceStrings [ "\\" ] [ "\\\\" ];
   qemu = import ./qemu.nix {
     inherit pkgs qemuMem;
     diskImage = "c.img";
   };
   # Double-escape because we produce a script from a shell heredoc
-  ssh = cmd: qemu.ssh (qemu.escape cmd);
+  ssh = cmd: qemu.ssh (escape cmd);
   scp = qemu.scp;
 
   sshCondaEnv = cmd: ssh "anaconda\\scripts\\activate && ${cmd}";
diff --git a/artiq/windows/qemu.nix b/artiq/windows/qemu.nix
index bdd9618..ecb7c8d 100644
--- a/artiq/windows/qemu.nix
+++ b/artiq/windows/qemu.nix
@@ -26,14 +26,13 @@ let
       argStr = builtins.concatStringsSep " " (args ++ extraArgs);
     in "qemu-system-x86_64 ${argStr}";
 
-  escape = builtins.replaceStrings [ "\\" ] [ "\\\\" ];
   sshOpts = "-o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=/tmp/known_hosts";
   ssh = cmd: ''
-    echo ssh windows '${escape cmd}'
+    echo ssh windows '${cmd}'
     ${sshpass}/bin/sshpass -p${sshPassword} -- \
       ${openssh}/bin/ssh  -np 2022 ${sshOpts} \
       ${sshUser}@localhost \
-      '${escape cmd}'
+      '${cmd}'
   '';
   scp = src: target: ''
     echo "Copy ${src} to ${target}"
@@ -44,6 +43,6 @@ let
   
 in
 {
-  inherit qemu-img runQemu escape ssh scp;
+  inherit qemu-img runQemu ssh scp;
   inputs = [ qemu openssh sshpass ];
 }
diff --git a/main.nix b/main.nix
index a32082a..efc07e4 100644
--- a/main.nix
+++ b/main.nix
@@ -30,6 +30,11 @@ let
     '';
   artiqpkgs = import "${generatedNix}/default.nix" { inherit pkgs; };
   artiqVersion = import "${generatedNix}/pkgs/artiq-version.nix";
+  windowsRunner = overrides:
+    import "${generatedNix}/windows" ({
+      inherit pkgs;
+      artiqPkg = artiqpkgs.conda-artiq;
+    } // overrides);
   jobs = (builtins.mapAttrs (key: value: pkgs.lib.hydraJob value) artiqpkgs) // {
     # This is in the example in the ARTIQ manual - precompile it to speed up
     # installation for users.
@@ -46,13 +51,26 @@ in
       constituents = builtins.attrValues jobs;
     };
 
+    windows-no-hardware-tests = pkgs.stdenv.mkDerivation {
+      name = "windows-no-hardware-tests";
+      src = ./.;
+      buildInputs = [ artiqpkgs.conda-artiq ];
+      phases = [ "buildPhase" ];
+      buildPhase = ''
+        ${windowsRunner {}}/bin/run.sh
+
+        mkdir $out
+        touch $out/passed
+      '';
+    };
+
     # HACK: Abuse fixed-output derivations to escape the sandbox and run the hardware
     # unit tests, all integrated in the Hydra interface.
     # One major downside of this hack is the tests are only run when generateTestOkHash
     # changes, i.e. when the ARTIQ version changes (and not the dependencies).
     # Impure derivations, when they land in Nix/Hydra, should improve the situation.
-    kc705-tests = pkgs.stdenv.mkDerivation {
-      name = "kc705-tests";
+    extended-tests = pkgs.stdenv.mkDerivation {
+      name = "extended-tests";
 
       outputHashAlgo = "sha256";
       outputHashMode = "recursive";
@@ -79,9 +97,13 @@ in
       sleep 15
       # ping: socket: Operation not permitted
       #ping kc705-1 -c10 -w30
+
       export ARTIQ_ROOT=`python -c "import artiq; print(artiq.__path__[0])"`/examples/kc705_nist_clock
       export ARTIQ_LOW_LATENCY=1
       python -m unittest discover -v artiq.test.coredevice
+
+      ${windowsRunner { testCommand = "set ARTIQ_ROOT=%cd%\\anaconda\\envs\\artiq-env\\Lib\\site-packages\\artiq\\examples\\kc705_nist_clock&&set ARTIQ_LOW_LATENCY=1&&python -m unittest discover -v artiq.test.coredevice"; }}/bin/run.sh
+
       mkdir $out
       cp ${generatedNix}/pkgs/artiq-version.nix $out/passed
       '';