diff --git a/kotlin.spec b/kotlin.spec
index 5fc7f3b..b6513a6 100644
--- a/kotlin.spec
+++ b/kotlin.spec
@@ -1,7 +1,7 @@
 %define pkgver %(echo %version | tr _ -)
 Name:          kotlin
 Version:       1.5.30_M1
-Release:       1mamba
+Release:       2mamba
 Summary:       Statically typed programming language that can interoperate with Java
 Group:         Applications/Development
 Vendor:        openmamba
@@ -12,6 +12,7 @@ Source:        https://github.com/JetBrains/kotlin/releases/download/v%{pkgver}/
 License:       Apache License 2.0
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
+BuildRequires: setconf
 
 %description
 Statically typed programming language that can interoperate with Java.
@@ -19,6 +20,12 @@ Statically typed programming language that can interoperate with Java.
 %prep
 %setup -q -n kotlinc
 
+cd bin
+setconf kotlin      DIR         %{_bindir}
+setconf kotlinc-js  DIR         %{_bindir}
+setconf kotlinc-jvm DIR         %{_bindir}
+setconf kotlinc     KOTLIN_HOME %{_datadir}/kotlin
+
 %build
 
 %install
@@ -53,5 +60,8 @@ install -D -m0644 build.txt %{buildroot}%{_datadir}/kotlin/build.txt
 %doc license/LICENSE.txt license/COPYRIGHT.txt license/COPYRIGHT_HEADER.txt
 
 %changelog
+* Sat Jul 31 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.5.30_M1-2mamba
+- fix executable paths with setconf
+
 * Sun Jul 25 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.5.30_M1-1mamba
 - package created using the webbuild interface