diff --git a/cli/build.gradle.kts b/cli/build.gradle.kts
index d3abb9f..975abd2 100644
--- a/cli/build.gradle.kts
+++ b/cli/build.gradle.kts
@@ -4,7 +4,8 @@ plugins {
     alias(libs.plugins.shadow)
 }
 
-val ANDROID = "_android_lib_"
+val ANDROID_LIB = "_android_lib_"
+val ANDROID_DESCRIPTORS = "_android_descriptors_"
 
 tasks {
     shadowJar {
@@ -16,16 +17,23 @@ tasks {
     test {
         systemProperty("classes", sourceSets.main.get().kotlin.classesDirectory.get().asFile.path)
         systemProperty("libraries", configurations.getAt("testRuntimeClasspath").asPath)
-        systemProperty("android-libraries", configurations.getAt(ANDROID).asPath)
+        systemProperty("android-libraries", configurations.getAt(ANDROID_LIB).asPath)
+        systemProperty("android-descriptors", configurations.getAt(ANDROID_DESCRIPTORS).asPath)
     }
 }
 
-configurations.create(ANDROID).isTransitive = false
+configurations.create(ANDROID_LIB).isTransitive = false
+configurations.create(ANDROID_DESCRIPTORS).isTransitive = false
 
 dependencies {
     implementation(libs.clikt)
     implementation(libs.protobuf.java)
     implementation(projects.core)
 
-    add(ANDROID, libs.timber)
+    addProvider<MinimalExternalModuleDependency, ExternalModuleDependency>(ANDROID_DESCRIPTORS, libs.gummy.bears) {
+        artifact {
+            extension = "expediter"
+        }
+    }
+    add(ANDROID_LIB, libs.timber)
 }
diff --git a/cli/src/main/kotlin/com/toasttab/expediter/cli/ExpediterCliCommand.kt b/cli/src/main/kotlin/com/toasttab/expediter/cli/ExpediterCliCommand.kt
index c2908ea..1058061 100644
--- a/cli/src/main/kotlin/com/toasttab/expediter/cli/ExpediterCliCommand.kt
+++ b/cli/src/main/kotlin/com/toasttab/expediter/cli/ExpediterCliCommand.kt
@@ -33,6 +33,7 @@ import com.toasttab.expediter.types.ClassfileSource
 import com.toasttab.expediter.types.ClassfileSourceType
 import protokt.v1.toasttab.expediter.v1.TypeDescriptors
 import java.io.File
+import java.util.zip.GZIPInputStream
 
 class ExpediterCliCommand : CliktCommand() {
     val output: String by option().required()
@@ -43,13 +44,13 @@ class ExpediterCliCommand : CliktCommand() {
     val platformDescriptors: String? by option()
     val projectName: String by option().default("project")
 
-    fun ignores() = ignoresFiles.flatMap {
+    private fun ignores() = ignoresFiles.flatMap {
         File(it).inputStream().use {
             IssueReport.fromJson(it).issues
         }
     }.toSet()
 
-    fun appTypes() = ClasspathApplicationTypesProvider(
+    private fun appTypes() = ClasspathApplicationTypesProvider(
         projectClasses.map { ClassfileSource(File(it), ClassfileSourceType.SOURCE_SET, it) } +
             libraries.map { ClassfileSource(File(it), ClassfileSourceType.EXTERNAL_DEPENDENCY, it) }
     )
@@ -62,7 +63,7 @@ class ExpediterCliCommand : CliktCommand() {
             JvmTypeProvider.forTarget(jvm)
         } else if (platformFile != null) {
             InMemoryPlatformTypeProvider(
-                platformFile.inputStream().use {
+                GZIPInputStream(platformFile.inputStream().buffered()).use {
                     TypeDescriptors.deserialize(it)
                 }.types
             )
diff --git a/cli/src/test/kotlin/com/toasttab/expediter/cli/ExpediterCliCommandIntegrationTest.kt b/cli/src/test/kotlin/com/toasttab/expediter/cli/ExpediterCliCommandIntegrationTest.kt
index e6ca889..a13cdff 100644
--- a/cli/src/test/kotlin/com/toasttab/expediter/cli/ExpediterCliCommandIntegrationTest.kt
+++ b/cli/src/test/kotlin/com/toasttab/expediter/cli/ExpediterCliCommandIntegrationTest.kt
@@ -17,6 +17,9 @@ package com.toasttab.expediter.cli
 
 import com.toasttab.expediter.issue.Issue
 import com.toasttab.expediter.issue.IssueReport
+import com.toasttab.expediter.types.MemberAccess
+import com.toasttab.expediter.types.MemberSymbolicReference
+import com.toasttab.expediter.types.MethodAccessType
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.io.TempDir
 import strikt.api.expectThat
@@ -56,11 +59,46 @@ class ExpediterCliCommandIntegrationTest {
     }
 
     @Test
-    fun `run on android library`() {
+    fun `run on self with descriptors`() {
         val output = dir.resolve("expediter.json")
 
+        println(System.getProperty("android-descriptors"))
+
         ExpediterCliCommand().main(
-            listOf(
+            System.getProperty("libraries").split(File.pathSeparatorChar).flatMap {
+                listOf("--libraries", it)
+            } + listOf(
+                "--project-classes", System.getProperty("classes"),
+                "--output", output.toString(),
+                "--platform-descriptors", System.getProperty("android-descriptors")
+            )
+        )
+
+        val report = output.inputStream().use {
+            IssueReport.fromJson(it)
+        }
+
+        expectThat(report.issues).contains(
+            Issue.MissingMember(
+                "com/toasttab/expediter/types/InspectedTypes",
+                MemberAccess.MethodAccess(
+                    "java/util/concurrent/ConcurrentMap",
+                    ref = MemberSymbolicReference(
+                        "computeIfAbsent",
+                        "(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;"
+                    ),
+                    accessType = MethodAccessType.INTERFACE
+                )
+            )
+        )
+    }
+
+    @Test
+    fun `run on android library`() {
+        val output = dir.resolve("expediter.json")
+
+        main(
+            arrayOf(
                 "--project-classes",
                 System.getProperty("android-libraries"),
                 "--output",
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b94df41..69ec66f 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -10,6 +10,7 @@ spotless = "6.25.0"
 protokt = "1.0.0-beta.1"
 protobuf = "4.26.1"
 shadow = "8.1.1"
+gummy-bears = "0.8.0"
 
 # test
 junit = "5.10.2"
@@ -36,8 +37,10 @@ junit = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit" }
 strikt-core = { module = "io.strikt:strikt-core", version.ref = "strikt" }
 testkit-junit5 = { module = "com.toasttab.gradle.testkit:junit5", version.ref = "testkit-plugin" }
 timber = { module = "com.jakewharton.timber:timber", version.ref = "timber" }
+gummy-bears = { module = "com.toasttab.android:gummy-bears-api-21", version.ref = "gummy-bears" }
 
 [plugins]
+build-config = { id = "com.github.gmazzo.buildconfig", version = "5.3.5" }
 serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin"}
 gradle-publish = { id = "com.gradle.plugin-publish", version = "1.2.1" }
 testkit-plugin = { id = "com.toasttab.testkit" , version.ref = "testkit-plugin" }
diff --git a/plugin/build.gradle.kts b/plugin/build.gradle.kts
index f40f203..0e955c9 100644
--- a/plugin/build.gradle.kts
+++ b/plugin/build.gradle.kts
@@ -3,6 +3,7 @@ plugins {
     `kotlin-dsl`
     `plugin-publishing-conventions`
     alias(libs.plugins.testkit.plugin)
+    alias(libs.plugins.build.config)
 }
 
 dependencies {
@@ -19,6 +20,11 @@ testkitTests {
     replaceToken("PROTOBUF_VERSION", libs.versions.protobuf.get())
 }
 
+buildConfig {
+    packageName.set("com.toasttab.expediter.gradle")
+    buildConfigField("String", "GUMMY_BEARS_VERSION", "\"${libs.versions.gummy.bears.get()}\"")
+}
+
 gradlePlugin {
     plugins {
         create("expediter") {
diff --git a/plugin/src/main/kotlin/com/toasttab/expediter/gradle/config/AndroidSpec.kt b/plugin/src/main/kotlin/com/toasttab/expediter/gradle/config/AndroidSpec.kt
index 65f6d2a..03336d3 100644
--- a/plugin/src/main/kotlin/com/toasttab/expediter/gradle/config/AndroidSpec.kt
+++ b/plugin/src/main/kotlin/com/toasttab/expediter/gradle/config/AndroidSpec.kt
@@ -1,9 +1,11 @@
 package com.toasttab.expediter.gradle.config
 
+import com.toasttab.expediter.gradle.BuildConfig
+
 open class AndroidSpec {
     var sdk: Int? = null
     var coreLibraryDesugaring: Boolean = false
-    var gummyBearsVersion: String = "0.8.0"
+    var gummyBearsVersion: String = BuildConfig.GUMMY_BEARS_VERSION
 
     fun artifact(): String {
         val base = "com.toasttab.android:gummy-bears-api-$sdk:$gummyBearsVersion"