diff --git a/composeApp/build.gradle.kts b/composeApp/build.gradle.kts
index d3a2975d..bb8eed65 100644
--- a/composeApp/build.gradle.kts
+++ b/composeApp/build.gradle.kts
@@ -25,13 +25,21 @@ kotlin {
         }
     }
     
-    listOf(
-        iosArm64(),
-        iosSimulatorArm64()
-    ).forEach { iosTarget ->
-        iosTarget.binaries.framework {
-            baseName = "ComposeApp"
-            isStatic = true
+    // Declared only on a mac, mirroring the gate lightning-kmp-app's :library applies to its own ios
+    // targets. Down the composite chain secp256k1-kmp declares a libsecp256k1 cinterop, which makes
+    // gradle switch off klib cross compilation for apple targets, so on a linux/windows host nothing
+    // in the build tree offers an ios variant of fr.acinq.phoenix:lightning-kmp-app. Declaring these
+    // targets anyway leaves every ios compilation unable to resolve it and fails the build outright.
+    // Building an ios binary needs a mac regardless.
+    if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
+        listOf(
+            iosArm64(),
+            iosSimulatorArm64()
+        ).forEach { iosTarget ->
+            iosTarget.binaries.framework {
+                baseName = "ComposeApp"
+                isStatic = true
+            }
         }
     }
     
@@ -119,8 +127,12 @@ kotlin {
             implementation(compose.desktop.currentOs)
             implementation(libs.kotlinx.coroutinesSwing)
         }
-        iosMain.dependencies {
-            implementation(libs.sqldelight.native.driver)
+        // Only exists when the ios targets above were declared; the default hierarchy template
+        // creates this source set from them.
+        if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
+            iosMain.dependencies {
+                implementation(libs.sqldelight.native.driver)
+            }
         }
     }
 }
@@ -164,9 +176,13 @@ dependencies {
     debugImplementation(libs.compose.uiTooling)
 //    ksp(libs.androidx.room3.compiler)
     add("kspAndroid", libs.androidx.room3.compiler)
-    add("kspIosSimulatorArm64", libs.androidx.room3.compiler)
-//    add("kspIosX64", libs.androidx.room.compiler)
-    add("kspIosArm64", libs.androidx.room3.compiler)
+    // These configurations only exist when the ios targets are declared, which the kotlin block
+    // above does only on a mac.
+    if (org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
+        add("kspIosSimulatorArm64", libs.androidx.room3.compiler)
+//        add("kspIosX64", libs.androidx.room.compiler)
+        add("kspIosArm64", libs.androidx.room3.compiler)
+    }
 //    add("kspJvm", libs.androidx.room3.compiler)
     // Add any other platform target you use in your project, for example kspDesktop
 }
diff --git a/gradle.properties b/gradle.properties
index 9550c009..8d436de2 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,13 @@ kotlin.daemon.jvmargs=-Xmx12g
 
 #Gradle
 org.gradle.jvmargs=-Xmx8g -Dfile.encoding=UTF-8
-org.gradle.configuration-cache=true
+# Off because the lightning-kmp-app composite build reaches, through its experimental/lightning-kmp
+# -> bitcoin-kmp -> secp256k1-kmp submodule chain, two tasks that cannot be serialized:
+# secp256k1-kmp's `:jni:generateHeaders` and `:native:buildSecp256k1<target>` both hold gradle
+# script object references. The configuration cache covers a whole build tree, so an included
+# build's incompatibility is this build's problem -- there is no per-build opt-out. Re-enable once
+# those two tasks are fixed upstream in the secp256k1-kmp fork, or if that includeBuild goes.
+org.gradle.configuration-cache=false
 org.gradle.caching=true
 
 #Android
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 37f78a6a..c42672d9 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.7.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/lightning-kmp-app b/lightning-kmp-app
index 6745d881..bbba08b1 160000
--- a/lightning-kmp-app
+++ b/lightning-kmp-app
@@ -1 +1 @@
-Subproject commit 6745d881d858b50f2e7108e59323c7e18a14dbcc
+Subproject commit bbba08b1224631d23768b6f5b044eca2f77518b6
diff --git a/secp256k1-frost-kmp b/secp256k1-frost-kmp
index e67fe177..d3b294d4 160000
--- a/secp256k1-frost-kmp
+++ b/secp256k1-frost-kmp
@@ -1 +1 @@
-Subproject commit e67fe177e4873dc2af8a07a57df6c85e02305a7c
+Subproject commit d3b294d4c5aab519bc91c2e2008dea223ae8b5cf