diff --git a/release.nix b/release.nix
index d4bd68b4..8361d8ef 100644
--- a/release.nix
+++ b/release.nix
@@ -94,7 +94,7 @@ let
           for i in $out/bin/*; do
               wrapProgram $i \
                   --prefix PERL5LIB ':' $out/libexec/hydra/lib:$PERL5LIB \
-                  --set PATH $out/bin:$hydraPath \
+                  --prefix PATH $out/bin:$hydraPath \
                   --set HYDRA_HOME $out/libexec/hydra \
                   --set HYDRA_RELEASE ${tarball.version}
           done