diff --git a/artiq-fast/conda-windows/binutils.nix b/artiq-fast/conda-windows/binutils.nix
index 0958bd0..0c12cfe 100644
--- a/artiq-fast/conda-windows/binutils.nix
+++ b/artiq-fast/conda-windows/binutils.nix
@@ -20,7 +20,7 @@ let
         version: ${version}
 
       source:
-        url: src.tar.bz2
+        url: ../src.tar.bz2
 
       EOF
 
@@ -53,7 +53,7 @@ let
       ${wfvm.utils.win-exec}/bin/win-exec "mkdir binutils"
       ${wfvm.utils.win-put}/bin/win-put meta.yaml ".\binutils"
       ${wfvm.utils.win-put}/bin/win-put bld.bat ".\binutils"
-      ${wfvm.utils.win-put}/bin/win-put ${src} ".\binutils\src.tar.bz2"
+      ${wfvm.utils.win-put}/bin/win-put ${src} ".\src.tar.bz2"
 
       ${wfvm.utils.win-exec}/bin/win-exec ".\Anaconda3\scripts\activate build && conda build --no-anaconda-upload --no-test binutils"