diff --git a/artiq-fast/conda-windows/binutils.nix b/artiq-fast/conda-windows/binutils.nix
index 9a7139e..e949415 100644
--- a/artiq-fast/conda-windows/binutils.nix
+++ b/artiq-fast/conda-windows/binutils.nix
@@ -69,6 +69,6 @@ in
   pkgs.runCommand "conda-windows-binutils-${target}" { buildInputs = [ build ]; } ''
     wfvm-run-build-binutils
     mkdir -p $out/win-64 $out/nix-support
-    cp *.tar.bz2 $out/win-64
+    cp binutils-*.tar.bz2 $out/win-64
     echo file conda $out/win-64/*.tar.bz2 >> $out/nix-support/hydra-build-products
     ''
diff --git a/artiq-fast/conda-windows/llvm-or1k.nix b/artiq-fast/conda-windows/llvm-or1k.nix
index 23feb72..9d4db78 100644
--- a/artiq-fast/conda-windows/llvm-or1k.nix
+++ b/artiq-fast/conda-windows/llvm-or1k.nix
@@ -61,6 +61,6 @@ in
   pkgs.runCommand "conda-windows-llvm-or1k" { buildInputs = [ build ]; } ''
     wfvm-run-build-llvm-or1k
     mkdir -p $out/win-64 $out/nix-support
-    cp *.tar.bz2 $out/win-64
+    cp llvm-or1k-*.tar.bz2 $out/win-64
     echo file conda $out/win-64/*.tar.bz2 >> $out/nix-support/hydra-build-products
     ''
diff --git a/artiq-fast/conda-windows/llvmlite-artiq.nix b/artiq-fast/conda-windows/llvmlite-artiq.nix
index dca11e6..10201ea 100644
--- a/artiq-fast/conda-windows/llvmlite-artiq.nix
+++ b/artiq-fast/conda-windows/llvmlite-artiq.nix
@@ -49,6 +49,6 @@ in
   pkgs.runCommand "conda-windows-llvmlite-artiq" { buildInputs = [ build ]; } ''
     wfvm-run-build-llvmlite-artiq
     mkdir -p $out/win-64 $out/nix-support
-    cp *.tar.bz2 $out/win-64
+    cp llvmlite-artiq-*.tar.bz2 $out/win-64
     echo file conda $out/win-64/*.tar.bz2 >> $out/nix-support/hydra-build-products
     ''