diff --git a/default.nix b/default.nix
index b5e217f7659..ba9601a3e08 100644
--- a/default.nix
+++ b/default.nix
@@ -172,6 +172,7 @@ let
       stylishHaskell = pkgs.callPackage ./scripts/test/stylish.nix { inherit (cardanoPkgs) stylish-haskell; inherit src localLib; };
       walletIntegration = pkgs.callPackage ./scripts/test/wallet/integration/build-test.nix { inherit walletIntegrationTests; };
       swaggerSchemaValidation = pkgs.callPackage ./scripts/test/wallet/swaggerSchemaValidation.nix { inherit gitrev; };
+      yamlValidation = pkgs.callPackage ./scripts/test/yamlValidation.nix { inherit cardanoPkgs; inherit (localLib) runHaskell; };
     };
     cardano-sl-explorer-frontend = (import ./explorer/frontend {
       inherit system config gitrev pkgs;
diff --git a/lib.nix b/lib.nix
index 3208e9c47ab..0ec489783be 100644
--- a/lib.nix
+++ b/lib.nix
@@ -82,4 +82,14 @@ in lib // (rec {
   forEnvironments = f: lib.mapAttrs'
     (name: env: lib.nameValuePair env.attr (f (env // { environment = name; })))
     (lib.filterAttrs (name: env: !env.private) environments);
+
+  runHaskell = name: hspkgs: deps: env: code: let
+    ghc = hspkgs.ghcWithPackages deps;
+    builtBinary = pkgs.runCommand "${name}-binary" { buildInputs = [ ghc ]; } ''
+      mkdir -p $out/bin/
+      ghc ${pkgs.writeText "${name}.hs" code} -o $out/bin/${name}
+    '';
+  in pkgs.runCommand name env ''
+    ${builtBinary}/bin/$name
+  '';
 })
diff --git a/log-configs/template-demo.yaml b/log-configs/template-demo.yaml
index b12bac2c694..1884068c7fd 100644
--- a/log-configs/template-demo.yaml
+++ b/log-configs/template-demo.yaml
@@ -5,10 +5,10 @@ rotation:
     keepFiles: 20
 loggerTree:
   severity: Debug+
-  file: {{file}}
+  file: tmpFileName
   handlers:
     - { name: "json"
-      , filepath: "{{file}}.json"
+      , filepath: "tmpFileName.json"
       , logsafety: PublicLogLevel
       , severity: Debug
       , backend: FileJsonBE }
diff --git a/scripts/common-functions.sh b/scripts/common-functions.sh
index 8edf9ab5327..46031af13da 100644
--- a/scripts/common-functions.sh
+++ b/scripts/common-functions.sh
@@ -65,8 +65,8 @@ function logs {
 
   local conf_file="$conf_dir/$log_file.yaml"
   # log files are named under the $logs_dir directory
-  # sed "s|{{file}}|$logs_dir/$log_file|g" "$template" > "$conf_file"
-  sed "s|{{file}}|$log_file|g" "$template" > "$conf_file"
+  # sed "s|tmpFileName|$logs_dir/$log_file|g" "$template" > "$conf_file"
+  sed "s|tmpFileName|$log_file|g" "$template" > "$conf_file"
   echo -n " --json-log=$logs_dir/logs/node$i.json "
   echo -n " --logs-prefix $logs_dir/logs --log-config $conf_file "
 }
diff --git a/scripts/test/yamlValidation.nix b/scripts/test/yamlValidation.nix
new file mode 100644
index 00000000000..79bf6036e09
--- /dev/null
+++ b/scripts/test/yamlValidation.nix
@@ -0,0 +1,56 @@
+{ runHaskell, cardanoPkgs }:
+
+runHaskell "yamlValidation" cardanoPkgs (ps: with ps; [
+  cardano-sl-util
+  cardano-sl-infra
+  split
+]) {
+  logConfigs = [
+    ../../log-configs/daedalus.yaml
+    #../../log-configs/greppable.yaml
+    ../../log-configs/connect-to-cluster.yaml
+    ../../log-configs/cluster.yaml
+    ../../log-configs/template-demo.yaml
+  ];
+  topologyConfigs = [
+    ../../docs/network/example-topologies/mainnet-staging.yaml
+    ../../docs/network/example-topologies/behind-nat-no-dns.yaml
+    ../../docs/network/example-topologies/behind-nat-with-dns.yaml
+    ../../docs/network/example-topologies/p2p.yaml
+    ../../docs/network/example-topologies/static-no-dns.yaml
+    ../../docs/network/example-topologies/static-with-dns.yaml
+    ../../docs/network/example-topologies/traditional.yaml
+  ];
+} ''
+  import Pos.Util.Log.LoggerConfig (LoggerConfig)
+  import Pos.Infra.Network.Yaml (Topology)
+  import Data.List.Split
+  import System.Environment
+  import Data.Yaml
+  import Control.Monad.Catch
+  import Data.Monoid
+
+  main :: IO ()
+  main = do
+    runTest "logConfigs" checkLogConfig
+    runTest "topologyConfigs" checkTopology
+    outpath <- getEnv "out"
+    writeFile outpath "done"
+
+  runTest :: FromJSON a => String -> (String -> IO a) -> IO ()
+  runTest var func = do
+    paths <- getEnv var
+    let
+      pathList = splitOn " " paths
+      doTest path = do
+        putStrLn $ "testing: " <> path
+        func path
+    mapM_ doTest pathList
+
+  checkLogConfig :: String -> IO LoggerConfig
+  checkLogConfig path = do
+    either throwM return =<< decodeFileEither path
+
+  checkTopology :: String -> IO Topology
+  checkTopology path = either throwM return =<< decodeFileEither path
+''