diff --git a/ksp/src/main/kotlin/fr/xgouchet/elmyr/ksp/ForgerableProcessor.kt b/ksp/src/main/kotlin/fr/xgouchet/elmyr/ksp/ForgerableProcessor.kt
index 9604f56..55d1a31 100644
--- a/ksp/src/main/kotlin/fr/xgouchet/elmyr/ksp/ForgerableProcessor.kt
+++ b/ksp/src/main/kotlin/fr/xgouchet/elmyr/ksp/ForgerableProcessor.kt
@@ -1,6 +1,7 @@
 package fr.xgouchet.elmyr.ksp
 
 import com.google.devtools.ksp.processing.CodeGenerator
+import com.google.devtools.ksp.processing.Dependencies
 import com.google.devtools.ksp.processing.KSPLogger
 import com.google.devtools.ksp.processing.Resolver
 import com.google.devtools.ksp.processing.SymbolProcessor
@@ -30,7 +31,8 @@ import com.squareup.kotlinpoet.STRING
 import com.squareup.kotlinpoet.TypeSpec
 import com.squareup.kotlinpoet.ksp.KotlinPoetKspPreview
 import com.squareup.kotlinpoet.ksp.toTypeName
-import com.squareup.kotlinpoet.ksp.writeTo
+import java.io.IOException
+import java.io.OutputStreamWriter
 
 /**
  * A Kotlin [SymbolProcessor] generating a [ForgeryFactory] implementation for every
@@ -127,8 +129,29 @@ class ForgerableProcessor(
         ) {
             logger.info("… ${data.classQualifiedName.asString()}.${function.simpleName.asString()}()")
 
-            generateFile(function, data.packageName, data.classQualifiedName)
-                .writeTo(codeGenerator, false, listOf(data.file))
+            val fileSpec = generateFile(function, data.packageName, data.classQualifiedName)
+            val dependencies = Dependencies(false, data.file)
+            try {
+                val outputStream = codeGenerator.createNewFile(
+                    dependencies,
+                    fileSpec.packageName,
+                    fileSpec.name
+                )
+                val writer = OutputStreamWriter(outputStream, Charsets.UTF_8)
+                fileSpec.writeTo(writer)
+                try {
+                    writer.flush()
+                    writer.close()
+                } catch (e: IOException) {
+                    logger.warn(
+                        "Error flushing writer for file ${fileSpec.packageName}.${fileSpec.name}: " +
+                                "${e.message}."
+                    )
+                }
+            } catch (e: IOException) {
+                logger.error("Error writing file ${fileSpec.packageName}.${fileSpec.name}")
+                logger.exception(e)
+            }
 
             logger.info("✔ ${data.classQualifiedName.asString()}.${function.simpleName.asString()}()")
         }