diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 02b7ee2cf..0355ff78d 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -29,10 +29,10 @@ jobs:
           path: |
             ~/.konan/dependencies
             ~/.konan/kotlin-native-prebuilt-linux-1.4.20-eap-37
-          key: ${{ runner.os }}-konan-1.4.0
-          restore-keys: ${{ runner.os }}-konan-1.4.0
+          key: ${{ runner.os }}-konan-1.4.20-eap-37
+          restore-keys: ${{ runner.os }}-konan-1.4.20-eap-37
       - name: Build with Gradle
-        run: ./gradlew -Dorg.gradle.daemon=false --build-cache :kmath-gsl:cinteropLibgslNative build
+        run: ./gradlew -Dorg.gradle.daemon=false --build-cache :kmath-gsl:cinteropLibgslLinuxX64 build
   build-osx:
     runs-on: macos-latest
 
@@ -59,7 +59,7 @@ jobs:
           path: |
             ~/.konan/dependencies
             ~/.konan/kotlin-native-prebuilt-macos-1.4.20-eap-37
-          key: ${{ runner.os }}-konan-1.4.0
-          restore-keys: ${{ runner.os }}-konan-1.4.0
+          key: ${{ runner.os }}-konan-1.4.20-eap-37
+          restore-keys: ${{ runner.os }}-konan-1.4.20-eap-37
       - name: Build with Gradle
-        run: ./gradlew -Dorg.gradle.daemon=false --build-cache :kmath-gsl:cinteropLibgslNative build
+        run: ./gradlew -Dorg.gradle.daemon=false --build-cache :kmath-gsl:cinteropLibgslMacosX64 build
diff --git a/gradle.properties b/gradle.properties
index 930bba550..b16859f29 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,9 +1,7 @@
 kotlin.code.style=official
-kotlin.parallel.tasks.in.project=true
 kotlin.mpp.enableGranularSourceSetsMetadata=true
-kotlin.native.enableDependencyPropagation=false
 kotlin.mpp.stability.nowarn=true
-
+kotlin.parallel.tasks.in.project=true
 org.gradle.jvmargs=-XX:MaxMetaspaceSize=512m
 org.gradle.parallel=true
-systemProp.org.gradle.internal.publish.checksums.insecure=true
\ No newline at end of file
+systemProp.org.gradle.internal.publish.checksums.insecure=true
diff --git a/kmath-gsl/src/nativeMain/kotlin/kscience/kmath/gsl/GslRealMatrix.kt b/kmath-gsl/src/nativeMain/kotlin/kscience/kmath/gsl/GslRealMatrix.kt
index 56e397aed..6ef3abdc8 100644
--- a/kmath-gsl/src/nativeMain/kotlin/kscience/kmath/gsl/GslRealMatrix.kt
+++ b/kmath-gsl/src/nativeMain/kotlin/kscience/kmath/gsl/GslRealMatrix.kt
@@ -12,7 +12,11 @@ import org.gnu.gsl.gsl_matrix_equal
 import org.gnu.gsl.gsl_matrix_get
 
 public sealed class GslMatrix<T : Any> : FeaturedMatrix<T> {
-    public abstract val nativeHandle: CValues<out CStructVar>
+    protected abstract val nativeHandle: CValues<out CStructVar>
+
+    override fun equals(other: Any?): Boolean {
+        return NDStructure.equals(this, other as? NDStructure<*> ?: return false)
+    }
 
     public override fun hashCode(): Int {
         var result = nativeHandle.hashCode()
@@ -21,7 +25,7 @@ public sealed class GslMatrix<T : Any> : FeaturedMatrix<T> {
     }
 }
 
-public class GslRealMatrix(public override val nativeHandle: CValues<gsl_matrix>, features: Set<MatrixFeature>) :
+public class GslRealMatrix(protected override val nativeHandle: CValues<gsl_matrix>, features: Set<MatrixFeature>) :
     GslMatrix<Double>() {
 
     public override val rowNum: Int
@@ -42,6 +46,6 @@ public class GslRealMatrix(public override val nativeHandle: CValues<gsl_matrix>
 
     public override fun equals(other: Any?): Boolean {
         if (other is GslRealMatrix) gsl_matrix_equal(nativeHandle, other.nativeHandle)
-        return NDStructure.equals(this, other as? NDStructure<*> ?: return false)
+        return super.equals(other)
     }
 }