diff --git a/pkgs/applications/misc/alacritty/default.nix b/pkgs/applications/misc/alacritty/default.nix
index 19f0790fea30..3135c1f88312 100644
--- a/pkgs/applications/misc/alacritty/default.nix
+++ b/pkgs/applications/misc/alacritty/default.nix
@@ -100,7 +100,7 @@ rustPlatform.buildRustPackage rec {
   '' + (
     if stdenv.isDarwin then ''
       mkdir $out/Applications
-      cp -r target/release/osx/Alacritty.app $out/Applications/Alacritty.app
+      cp -r $releaseDir/osx/Alacritty.app $out/Applications/Alacritty.app
     '' else ''
       install -D extra/linux/Alacritty.desktop -t $out/share/applications/
       install -D extra/logo/alacritty-term.svg $out/share/icons/hicolor/scalable/apps/Alacritty.svg
diff --git a/pkgs/tools/nix/cached-nix-shell/default.nix b/pkgs/tools/nix/cached-nix-shell/default.nix
index dc69d3f030d7..03f6bc2b1171 100644
--- a/pkgs/tools/nix/cached-nix-shell/default.nix
+++ b/pkgs/tools/nix/cached-nix-shell/default.nix
@@ -34,7 +34,7 @@ in rustPlatform.buildRustPackage rec {
 
   postInstall = ''
     mkdir -p $out/lib $out/share/cached-nix-shell $out/share/man/man1 $out/var/empty
-    cp target/release/build/cached-nix-shell-*/out/trace-nix.so $out/lib
+    cp $releaseDir/build/cached-nix-shell-*/out/trace-nix.so $out/lib
     cp rcfile.sh $out/share/cached-nix-shell/rcfile.sh
     cp cached-nix-shell.1 $out/share/man/man1
   '';