diff --git a/nixos/modules/programs/ccache.nix b/nixos/modules/programs/ccache.nix
index 99702f955162..7dad40fcec2c 100644
--- a/nixos/modules/programs/ccache.nix
+++ b/nixos/modules/programs/ccache.nix
@@ -81,6 +81,7 @@ in
           ccacheWrapper = super.ccacheWrapper.override {
             extraConfig = ''
               export CCACHE_COMPRESS=1
+              export CCACHE_SLOPPINESS=random_seed
               export CCACHE_DIR="${cfg.cacheDir}"
               export CCACHE_UMASK=007
               if [ ! -d "$CCACHE_DIR" ]; then
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 50d26f4aa7bd..14b2e04db764 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6722,6 +6722,7 @@ with pkgs;
   #     ccacheWrapper = pkgs.ccacheWrapper.override {
   #       extraConfig = ''
   #         export CCACHE_COMPRESS=1
+  #         export CCACHE_SLOPPINESS=random_seed
   #         export CCACHE_DIR=/var/cache/ccache
   #         export CCACHE_UMASK=007
   #       '';