diff --git a/packages/mcl/src/src/mcl/commands/ci_matrix.d b/packages/mcl/src/src/mcl/commands/ci_matrix.d
index e02c329f..764636ad 100755
--- a/packages/mcl/src/src/mcl/commands/ci_matrix.d
+++ b/packages/mcl/src/src/mcl/commands/ci_matrix.d
@@ -368,7 +368,7 @@ Package[] nixEvalJobs(string flakeAttrPrefix, string cachixUrl, bool doCheck = t
     })(false);
 
     const stderrLogs = pipes.stderr.byLine
-        .filter!(line => !uselessWarnings.canFind(line))
+        .filter!(line => !uselessWarnings.any!(w => line.canFind(w)))
         .join("\n");
 
     logWarning(stderrLogs);
diff --git a/packages/mcl/src/src/mcl/commands/deploy_spec.d b/packages/mcl/src/src/mcl/commands/deploy_spec.d
index 19b67ad1..1dba3f26 100644
--- a/packages/mcl/src/src/mcl/commands/deploy_spec.d
+++ b/packages/mcl/src/src/mcl/commands/deploy_spec.d
@@ -20,6 +20,8 @@ export void deploy_spec()
 {
     const deploySpecFile = resultDir.buildPath("cachix-deploy-spec.json");
 
+    DeploySpec spec;
+
     if (!exists(deploySpecFile))
     {
         auto nixosConfigs = flakeAttr("legacyPackages", SupportedSystem.x86_64_linux, "bareMetalMachines")
@@ -39,19 +41,21 @@ export void deploy_spec()
         if (!configsMissingFromCachix.empty)
             throw new Exception("Some Nixos configurations are not in cachix. Please cache them first.");
 
-        auto spec = nixosConfigs.createMachineDeploySpec().toJSON;
-
-        infof("Deploy spec: %s", spec.toPrettyString(JSONOptions.doNotEscapeSlashes));
-
-        writeFile(deploySpecFile, spec.toString());
+        spec = nixosConfigs.createMachineDeploySpec();
+        writeFile(deploySpecFile, spec.toJSON.toPrettyString(JSONOptions.doNotEscapeSlashes));
     }
     else
     {
         warningf("Reusing existing deploy spec at:\n'%s'", deploySpecFile.bold);
-
-        warningf("\n---\n%s\n---", deploySpecFile.tryDeserializeFromJsonFile!DeploySpec);
+        spec = deploySpecFile.tryDeserializeFromJsonFile!DeploySpec;
     }
 
+    infof("\n---\n%s\n---", spec);
+    infof("%s machines will be deployed.", spec.agents.length);
+
+    if (!spec.agents.length)
+        return;
+
     spawnProcessInline([
         "cachix", "deploy", "activate", deploySpecFile, "--async"
     ]);
diff --git a/packages/mcl/src/src/mcl/utils/json.d b/packages/mcl/src/src/mcl/utils/json.d
index c60b2c54..602204ba 100644
--- a/packages/mcl/src/src/mcl/utils/json.d
+++ b/packages/mcl/src/src/mcl/utils/json.d
@@ -328,5 +328,5 @@ T tryDeserializeFromJsonFile(T)(string path)
 
     return json
         .fromJSON!T()
-        .tryGet("Error deserializing %s. JSON: %s".format(T.stringof.bold, json.toPrettyString().bold));
+        .tryGet("Error deserializing %s. JSON: \n%s".format(T.stringof.bold, json.toPrettyString().bold));
 }