diff --git a/attributes-kt/build.gradle.kts b/attributes-kt/build.gradle.kts
index 5956f1f16..555567aac 100644
--- a/attributes-kt/build.gradle.kts
+++ b/attributes-kt/build.gradle.kts
@@ -3,7 +3,7 @@ plugins {
     `maven-publish`
 }
 
-version = "0.1.0"
+version = rootProject.extra.get("attributesVersion").toString()
 
 kscience {
     jvm()
diff --git a/build.gradle.kts b/build.gradle.kts
index ec82e8eeb..9ee719967 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,6 +6,8 @@ plugins {
     id("org.jetbrains.kotlinx.kover") version "0.7.6"
 }
 
+val attributesVersion by extra("0.1.0")
+
 allprojects {
     repositories {
         maven("https://repo.kotlin.link")
diff --git a/examples/build.gradle.kts b/examples/build.gradle.kts
index 97a3cb8c2..b155f2653 100644
--- a/examples/build.gradle.kts
+++ b/examples/build.gradle.kts
@@ -67,8 +67,8 @@ kotlin {
 }
 
 tasks.withType<KotlinJvmCompile> {
-    kotlinOptions {
-        freeCompilerArgs = freeCompilerArgs + "-Xjvm-default=all" + "-Xopt-in=kotlin.RequiresOptIn" + "-Xlambdas=indy"
+    compilerOptions{
+        freeCompilerArgs.addAll("-Xjvm-default=all", "-Xopt-in=kotlin.RequiresOptIn", "-Xlambdas=indy")
     }
 }
 
diff --git a/kmath-optimization/src/commonMain/kotlin/space/kscience/kmath/optimization/XYFit.kt b/kmath-optimization/src/commonMain/kotlin/space/kscience/kmath/optimization/XYFit.kt
index 3861a796d..a954b769a 100644
--- a/kmath-optimization/src/commonMain/kotlin/space/kscience/kmath/optimization/XYFit.kt
+++ b/kmath-optimization/src/commonMain/kotlin/space/kscience/kmath/optimization/XYFit.kt
@@ -124,7 +124,7 @@ public suspend fun XYColumnarData<Double, Double, Double>.fitWith(
         this,
         modelExpression,
         attributes.modify<XYFit> {
-            set(::OptimizationStartPoint, startingPoint)
+            set(OptimizationStartPoint(), startingPoint)
             if (!hasAny<OptimizationLog>()) {
                 set(OptimizationLog, Loggable.console)
             }