diff --git a/internal/rosa/zstd.go b/internal/rosa/zstd.go
index 05164cf..ccbd713 100644
--- a/internal/rosa/zstd.go
+++ b/internal/rosa/zstd.go
@@ -16,6 +16,7 @@ func (t Toolchain) newZstd() pkg.Artifact {
 		Append: []string{"build", "cmake"},
 		Cache: [][2]string{
 			{"CMAKE_BUILD_TYPE", "Release"},
+			{"CMAKE_INSTALL_LIBDIR", "lib"},
 		},
 	})
 }