diff --git a/pkgs/development/tools/misc/trv/default.nix b/pkgs/development/tools/misc/trv/default.nix
index 4b00e92b4c3..e73d77f772d 100644
--- a/pkgs/development/tools/misc/trv/default.nix
+++ b/pkgs/development/tools/misc/trv/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   createFindlibDestdir = true;
   dontStrip = true;
 
-  installFlags = "SEMVER=${version} PREFIX=$out";
+  installFlags = "SEMVER=${version} PREFIX=$(out)";
 
   meta = with stdenv.lib; {
     homepage = https://github.com/afiniate/trv;