1 files changed, 1 insertions, 3 deletions

diff --git a/ymir.nix b/ymir.nix
index 3c5caf66..52116927 100644
--- a/ymir.nix
+++ b/ymir.nix
@@ -90,9 +90,7 @@ in rec {
 
         function zshexit() { [[ -n "''${tmpFile}" && -e "''${tmpFile}" ]] && rm -f "''${tmpFile}" }
 
-        cat >! "''${tmpFile}"
-
-        prefix=$(sha512sum "''${tmpFile}" | awk '{ print $1; }' | head -c 10)
+        prefix=$(tee "''${tmpFile}" | sha512sum | awk '{ print $1; }' | head -c 10)
         prefix=''${prefix:l}
         filename="$1"