diff --git a/artiq-fast.nix b/artiq-fast.nix
index 85c2616..76b0096 100644
--- a/artiq-fast.nix
+++ b/artiq-fast.nix
@@ -37,6 +37,7 @@ let
   windowsRunner = overrides:
     import "${generatedNix}/windows/run-test.nix" ({
       inherit pkgs;
+      sipycoPkg = artiqpkgs.conda-sipyco;
       artiqPkg = artiqpkgs.conda-artiq;
     } // overrides);
   jobs = (builtins.mapAttrs (key: value: pkgs.lib.hydraJob value) artiqpkgs);
diff --git a/artiq-fast/conda-artiq-deps.nix b/artiq-fast/conda-artiq-deps.nix
index 0a451cf..2be8139 100644
--- a/artiq-fast/conda-artiq-deps.nix
+++ b/artiq-fast/conda-artiq-deps.nix
@@ -15,4 +15,5 @@
   "pygit2"
   "aiohttp >=3"
   "python-levenshtein"
+  "sipyco"
 ]
diff --git a/artiq-fast/pkgs/artiq.nix b/artiq-fast/pkgs/artiq.nix
index 5e2892d..83555fa 100644
--- a/artiq-fast/pkgs/artiq.nix
+++ b/artiq-fast/pkgs/artiq.nix
@@ -9,7 +9,7 @@ in
     src = import ./artiq-src.nix { inherit fetchgit; };
     preBuild = "export VERSIONEER_OVERRIDE=${version}";
     propagatedBuildInputs = [ binutils-or1k llvm-or1k llvmlite-artiq qt5Full ]
-      ++ (with pythonDeps; [ levenshtein pyqtgraph-qt5 quamash pythonparser ])
+      ++ (with pythonDeps; [ sipyco levenshtein pyqtgraph-qt5 quamash pythonparser ])
       ++ (with python3Packages; [ aiohttp pygit2 numpy dateutil scipy prettytable pyserial h5py pyqt5 ]);
     checkInputs = [ binutils-or1k outputcheck ];
     checkPhase =
diff --git a/artiq-fast/windows/manual-test-run.nix b/artiq-fast/windows/manual-test-run.nix
index 609c1e5..b04ae8d 100644
--- a/artiq-fast/windows/manual-test-run.nix
+++ b/artiq-fast/windows/manual-test-run.nix
@@ -1,6 +1,7 @@
 # This runs `run-test.nix` with `nix-build`
 
 { pkgs ? import <nixpkgs> {},
+  artiqpkgs ? import ../. { inherit pkgs; },
   diskImage ? "/opt/windows/c.img",
   qemuMem ? "2G",
   testTimeout ? 180,
@@ -12,6 +13,8 @@ let
   windowsRunner = overrides:
     import ./run-test.nix ({
       inherit pkgs diskImage qemuMem testTimeout;
+      sipycoPkg = artiqpkgs.conda-sipyco;
+      artiqPkg = artiqpkgs.conda-artiq;
     } // overrides);
 in
 
diff --git a/artiq-fast/windows/run-test.nix b/artiq-fast/windows/run-test.nix
index dc15b43..24b2cc1 100644
--- a/artiq-fast/windows/run-test.nix
+++ b/artiq-fast/windows/run-test.nix
@@ -1,8 +1,9 @@
 { pkgs,
+  sipycoPkg,
+  artiqPkg,
   diskImage ? "/opt/windows/c.img",
   qemuMem ? "2G",
   testTimeout ? 600,
-  artiqPkg ? import ../conda-artiq.nix { inherit pkgs; },
   testCommand ? "python -m unittest discover -v artiq.test",
 }:
 
@@ -52,9 +53,9 @@ stdenv.mkDerivation {
     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"}
+    for pkg in ${sipycoPkg}/noarch/sipyco*.tar.bz2 ${artiqPkg}/noarch/artiq*.tar.bz2 ; do
+      ${scp "\\$pkg" "to_install.tar.bz2"}
+      ${ssh "anaconda\\scripts\\activate ${condaEnv} && conda install to_install.tar.bz2"}
     done
 
     # Schedule a timed shutdown against hanging test runs