diff --git a/modules/electrs.nix b/modules/electrs.nix
index bf81cd7..13b886a 100644
--- a/modules/electrs.nix
+++ b/modules/electrs.nix
@@ -61,6 +61,12 @@ in {
   };
 
   config = mkIf cfg.enable (mkMerge [{
+    assertions = [
+      { assertion = config.services.bitcoind.prune == 0;
+        message = "electrs does not support bitcoind pruning.";
+      }
+    ];
+
     environment.systemPackages = [ pkgs.nix-bitcoin.electrs ];
 
     systemd.tmpfiles.rules = [
diff --git a/modules/hardware-wallets.nix b/modules/hardware-wallets.nix
index 8337e5c..4d53884 100644
--- a/modules/hardware-wallets.nix
+++ b/modules/hardware-wallets.nix
@@ -33,6 +33,15 @@ in {
 
   config = mkMerge [
     (mkIf (cfg.ledger || cfg.trezor) {
+      assertions = [
+        { assertion = (config.services.bitcoind.disablewallet == null || !config.services.bitcoind.disablewallet);
+          message = ''
+            Hardware-Wallets are not compatible with bitcoind.disablewallet.
+            Note that this option is active when enabling electrs.high-memory.
+          '';
+        }
+      ];
+
       environment.systemPackages = with pkgs; [
         nix-bitcoin.hwi
         # Provides lsusb for debugging
diff --git a/modules/lightning-charge.nix b/modules/lightning-charge.nix
index d5d1d67..e2d4ce5 100644
--- a/modules/lightning-charge.nix
+++ b/modules/lightning-charge.nix
@@ -24,6 +24,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.clightning.enable;
+        message = "lightning-charge requires clightning.";
+      }
+    ];
+
     users.users.lightning-charge = {
       description = "lightning-charge User";
       group = "lightning-charge";
diff --git a/modules/lnd.nix b/modules/lnd.nix
index 8f60a16..ef60dcb 100644
--- a/modules/lnd.nix
+++ b/modules/lnd.nix
@@ -83,6 +83,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.bitcoind.prune == 0;
+        message = "lnd does not support bitcoind pruning.";
+      }
+    ];
+
     environment.systemPackages = [ cfg.package (hiPrio cfg.cli) ];
 
     systemd.tmpfiles.rules = [
diff --git a/modules/nanopos.nix b/modules/nanopos.nix
index 2f30446..91af50c 100644
--- a/modules/nanopos.nix
+++ b/modules/nanopos.nix
@@ -52,6 +52,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.lightning-charge.enable;
+        message = "nanopos requires lightning-charge.";
+      }
+    ];
+
     environment.systemPackages = [ pkgs.nix-bitcoin.nanopos ];
     systemd.services.nanopos = {
       description = "Run nanopos";
diff --git a/modules/nix-bitcoin-webindex.nix b/modules/nix-bitcoin-webindex.nix
index a857ffb..39ba9b9 100644
--- a/modules/nix-bitcoin-webindex.nix
+++ b/modules/nix-bitcoin-webindex.nix
@@ -47,6 +47,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.nanopos.enable;
+        message = "nix-bitcoin-webindex requires nanopos.";
+      }
+    ];
+
     systemd.tmpfiles.rules = [
       "d /var/www 0755 nginx nginx - -"
     ];
diff --git a/modules/recurring-donations.nix b/modules/recurring-donations.nix
index 659891a..901c8f7 100644
--- a/modules/recurring-donations.nix
+++ b/modules/recurring-donations.nix
@@ -78,6 +78,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.clightning.enable;
+        message = "recurring-donations requires clightning.";
+      }
+    ];
+
     users.users.recurring-donations = {
         description = "recurring-donations User";
         group = "recurring-donations";
diff --git a/modules/spark-wallet.nix b/modules/spark-wallet.nix
index a329def..477bdfd 100644
--- a/modules/spark-wallet.nix
+++ b/modules/spark-wallet.nix
@@ -46,6 +46,12 @@ in {
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      { assertion = config.services.clightning.enable;
+        message = "spark-wallet requires clightning.";
+      }
+    ];
+
     environment.systemPackages = [ pkgs.nix-bitcoin.spark-wallet ];
     users.users.spark-wallet = {
       description = "spark-wallet User";