diff --git a/changelog/@unreleased/pr-1128.v2.yml b/changelog/@unreleased/pr-1128.v2.yml
new file mode 100644
index 000000000..53068c773
--- /dev/null
+++ b/changelog/@unreleased/pr-1128.v2.yml
@@ -0,0 +1,5 @@
+type: fix
+fix:
+  description: extractIr task dependencies are configured correctly
+  links:
+  - https://github.com/palantir/gradle-conjure/pull/1128
diff --git a/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ConjureJavaLocalCodegenPlugin.java b/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ConjureJavaLocalCodegenPlugin.java
index 8266fa087..db6836d9a 100644
--- a/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ConjureJavaLocalCodegenPlugin.java
+++ b/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ConjureJavaLocalCodegenPlugin.java
@@ -25,28 +25,24 @@
 import com.palantir.gradle.dist.RecommendedProductDependenciesExtension;
 import com.palantir.gradle.dist.RecommendedProductDependenciesPlugin;
 import com.palantir.logsafe.exceptions.SafeRuntimeException;
-import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
-import java.util.regex.Pattern;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.Dependency;
+import org.gradle.api.file.RegularFile;
 import org.gradle.api.plugins.JavaBasePlugin;
 import org.gradle.api.plugins.JavaLibraryPlugin;
 import org.gradle.api.provider.Provider;
-import org.gradle.api.tasks.Copy;
 import org.gradle.api.tasks.TaskProvider;
 
 public final class ConjureJavaLocalCodegenPlugin implements Plugin<Project> {
     private static final ObjectMapper OBJECT_MAPPER = ObjectMappers.newClientObjectMapper();
     private static final String CONJURE_CONFIGURATION = "conjure";
-    private static final Pattern DEFINITION_NAME =
-            Pattern.compile("(.*)-([0-9]+\\.[0-9]+\\.[0-9]+(?:-rc[0-9]+)?(?:-[0-9]+-g[a-f0-9]+)?)(\\.conjure)?\\.json");
 
     @Override
     public void apply(Project project) {
@@ -56,11 +52,10 @@ public void apply(Project project) {
                 project.getExtensions().create(ConjureExtension.EXTENSION_NAME, ConjureExtension.class);
 
         Configuration conjureIrConfiguration = project.getConfigurations().create(CONJURE_CONFIGURATION);
-        TaskProvider<Copy> extractConjureIr = project.getTasks().register("extractConjureIr", Copy.class, task -> {
-            task.rename(DEFINITION_NAME, "$1.conjure.json");
-            task.from(conjureIrConfiguration);
-            task.into(project.getLayout().getBuildDirectory().dir("conjure-ir"));
-        });
+        TaskProvider<ExtractConjureIrTask> extractConjureIr = project.getTasks()
+                .register("extractConjureIr", ExtractConjureIrTask.class, task -> {
+                    task.getIrConfiguration().set(conjureIrConfiguration);
+                });
 
         TaskProvider<ExtractExecutableTask> extractJavaTask = ExtractConjurePlugin.applyConjureJava(project);
 
@@ -71,7 +66,7 @@ private static void setupSubprojects(
             Project project,
             ConjureExtension extension,
             TaskProvider<ExtractExecutableTask> extractJavaTask,
-            TaskProvider<Copy> extractConjureIr,
+            TaskProvider<ExtractConjureIrTask> extractConjureIr,
             Configuration conjureIrConfiguration) {
 
         // Validating that each subproject has a corresponding definition and vice versa.
@@ -106,7 +101,7 @@ private static void createGenerateTask(
             Project project,
             ConjureExtension extension,
             TaskProvider<ExtractExecutableTask> extractJavaTask,
-            TaskProvider<Copy> extractConjureIr) {
+            TaskProvider<ExtractConjureIrTask> extractConjureIr) {
         ConjurePlugin.ignoreFromCheckUnusedDependencies(project);
         ConjurePlugin.addGeneratedToMainSourceSet(project);
 
@@ -117,8 +112,8 @@ private static void createGenerateTask(
         TaskProvider<WriteGitignoreTask> generateGitIgnore = ConjurePlugin.createWriteGitignoreTask(
                 project, "gitignoreConjure", project.getProjectDir(), ConjurePlugin.JAVA_GITIGNORE_CONTENTS);
 
-        Provider<File> conjureIrFile = extractConjureIr.map(
-                irTask -> new File(irTask.getDestinationDir(), project.getName() + ".conjure.json"));
+        Provider<RegularFile> conjureIrFile =
+                extractConjureIr.flatMap(task -> task.getConjureIr().file(project.getName() + ".conjure.json"));
 
         project.getExtensions()
                 .getByType(RecommendedProductDependenciesExtension.class)
@@ -156,10 +151,10 @@ private static String sanitizePackageName(String group) {
         return group.replaceAll("-", "");
     }
 
-    private static Set<ProductDependency> extractProductDependencies(File irFile) {
+    private static Set<ProductDependency> extractProductDependencies(RegularFile irFile) {
         try {
             MinimalConjureDefinition conjureDefinition =
-                    OBJECT_MAPPER.readValue(irFile, MinimalConjureDefinition.class);
+                    OBJECT_MAPPER.readValue(irFile.getAsFile(), MinimalConjureDefinition.class);
             return conjureDefinition
                     .extensions()
                     .map(MinimalConjureDefinition.Extensions::productDependencies)
diff --git a/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ExtractConjureIrTask.java b/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ExtractConjureIrTask.java
new file mode 100644
index 000000000..2a21e1bd4
--- /dev/null
+++ b/gradle-conjure/src/main/java/com/palantir/gradle/conjure/ExtractConjureIrTask.java
@@ -0,0 +1,46 @@
+/*
+ * (c) Copyright 2022 Palantir Technologies Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.palantir.gradle.conjure;
+
+import java.util.regex.Pattern;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.Sync;
+
+public abstract class ExtractConjureIrTask extends Sync {
+
+    private static final Pattern DEFINITION_NAME =
+            Pattern.compile("(.*)-([0-9]+\\.[0-9]+\\.[0-9]+(?:-rc[0-9]+)?(?:-[0-9]+-g[a-f0-9]+)?)(\\.conjure)?\\.json");
+
+    public ExtractConjureIrTask() {
+        rename(DEFINITION_NAME, "$1.conjure.json");
+        from(getIrConfiguration());
+        getConjureIr().set(getProject().getLayout().getBuildDirectory().dir("conjure-ir"));
+        getConjureIr().disallowChanges();
+        into(getConjureIr());
+    }
+
+    /** Configuration used to resolve IR. */
+    @Input
+    public abstract Property<Configuration> getIrConfiguration();
+
+    @OutputDirectory
+    public abstract DirectoryProperty getConjureIr();
+}