A modern programming language that makes developers happier.

kotlinlang

With help from all you folks in this thread - thank you! - I managed to fix it as follows:

First get rid of the red-lines in the IDE, by changing
```ios()```
into
```    val onPhone = System.getenv("SDK_NAME")?.startsWith("iphoneos") ?: false
    if (onPhone) {
        iosArm64("ios")
    } else {
        iosX64("ios")
    }```

However, this causes the `packForXcode` task configuration to fail because of this expression:
```kotlin.targets.getByName&lt;KotlinNativeTarget&gt;(targetName).binaries.getFramework(mode)```
To fix this, change the above expression to:
```kotlin.targets.getByName&lt;KotlinNativeTarget&gt;("ios").binaries.getFramework(mode)```
After this, you may get red-lines in the `commonMain` source-set.
To fix this, disable setting the `enableGranularSourceSetsMetadata` in your `gradle.properties`, like this:
```...
#kotlin.mpp.enableGranularSourceSetsMetadata=true
kotlin.native.enableDependencyPropagation=false```