diff --git a/flake.nix b/flake.nix
index 0d07b9de3..b115af618 100644
--- a/flake.nix
+++ b/flake.nix
@@ -42,7 +42,7 @@
         packages.default = yosys;
         defaultPackage = yosys;
         devShell = pkgs.mkShell {
-          buildInputs = with pkgs; [ clang llvmPackages.bintools gcc bison flex libffi tcl readline python3 zlib git gtest abc-verifier verilog boost python3Packages.boost ];
+          buildInputs = with pkgs; [ clang llvmPackages.bintools gcc bison flex libffi tcl readline python3 zlib git gtest abc-verifier verilog boost python3Packages.boost ccache ];
         };
       }
     );