diff --git a/CHANGELOG.md b/CHANGELOG.md
index 285329d..63216bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,6 @@ All notable changes to this project will be documented in this file. See [standa
 ### Documentation
 
 * add playground ([347f7c9](https://github.com/dico-app/dico-cli/commit/347f7c919e1227fa308b04eb960975ece3a34b29))
-* rename playground files to prevent conflicts ([a82bf08](https://github.com/dico-app/dico-cli/commit/a82bf08a01810d918c75f305dabe1673bcb039bb))
 * rename playground files to prevent conflicts ([32365e9](https://github.com/dico-app/dico-cli/commit/32365e9b74e3bbcb2bf4891d2dce43888f688329))
 * update readme ([b34f0f0](https://github.com/dico-app/dico-cli/commit/b34f0f08e1c1286be9fcef9ec03eb4481b4859e1))
 
diff --git a/src/commands/build.ts b/src/commands/build.ts
index 2fc6b1b..1f55d90 100644
--- a/src/commands/build.ts
+++ b/src/commands/build.ts
@@ -11,15 +11,15 @@ import * as project from "../core/project";
 import * as messages from "../messages";
 import exit from "exit";
 import { DEFAULT_TIMEOUT } from "../const";
-import { ConfigJSON } from "../types";
+import { ConfigJSON, ProjectKey } from "../types";
 
 class BuildError extends Error {}
 
 interface BuildDicoContext {
 	paths: string[];
-	keys: { path: string; key: string }[];
+	keys: ProjectKey[];
 	schema: ConfigJSON["schema"];
-	conflicts: { path: string; key: string }[][];
+	conflicts: ProjectKey[][];
 }
 
 const buildDico = new Listr(
@@ -62,12 +62,12 @@ const buildDico = new Listr(
 						const path = ctx.paths[i];
 
 						promises.push(
-							new Promise<{ path: string; key: string }[]>((res, rej) => {
+							new Promise<ProjectKey[]>((res, rej) => {
 								setTimeout(() => {
 									observer.next(`(${i + 1}/${ctx.paths.length}) ${path}`);
 									try {
 										const keys = project.crawlFile(path);
-										res(keys.map(key => ({ path, key })));
+										res(keys);
 									} catch (error) {
 										rej(error);
 									}
@@ -149,7 +149,8 @@ export const build = async (
 	lineBreak();
 
 	try {
-		await buildDico.run();
+		const { keys } = await buildDico.run();
+		console.log(keys);
 	} catch (error) {
 		// Handle conflicts error
 		if (error instanceof BuildError && error.message.includes("conflict")) {
@@ -165,17 +166,21 @@ export const build = async (
 				if (conflict.length === 1) {
 					console.log(
 						`  Key ${chalk.cyan(conflict[0].key)} (${chalk.cyan(
-							conflict[0].path
-						)}) is conflicting`
+							`${conflict[0].file}:${conflict[0].line}:${conflict[0].column}`
+						)}) is conflicting with at least another unknown declaration, this shouldn't happen`
 					);
 				} else {
 					console.log(
 						`  Key ${chalk.cyan(conflict[0].key)} (${chalk.cyan(
-							conflict[0].path
+							`${conflict[0].file}:${conflict[0].line}:${conflict[0].column}`
 						)}) is conflicting with key ${chalk.cyan(
 							conflict[1].key
-						)} (${chalk.cyan(conflict[1].path)})${
-							conflict.length > 2 ? ` and ${conflict.length - 2} more...` : ""
+						)} (${chalk.cyan(
+							`${conflict[1].file}:${conflict[1].line}:${conflict[1].column}`
+						)})${
+							conflict.length > 2
+								? ` and ${conflict.length - 2} more from that collection...`
+								: ""
 						}`
 					);
 				}
diff --git a/src/core/dicojson.ts b/src/core/dicojson.ts
index d1371be..bc317ca 100644
--- a/src/core/dicojson.ts
+++ b/src/core/dicojson.ts
@@ -1,7 +1,7 @@
 import fs from "fs";
 import path from "path";
 import { JSON_FILE } from "../const";
-import { ConfigJSON } from "../types";
+import { ConfigJSON, ProjectKey } from "../types";
 import * as messages from "../messages";
 import detectIndent from "detect-indent";
 
@@ -47,13 +47,13 @@ export const write = (config: ConfigJSON): void => {
 
 // TODO: Better test this
 export const createSchema = (
-	keys: { path: string; key: string }[]
+	keys: ProjectKey[]
 ): {
 	schema: ConfigJSON["schema"];
-	conflicts: { path: string; key: string }[][];
+	conflicts: ProjectKey[][];
 } => {
 	const schema: ConfigJSON["schema"] = {};
-	const conflicts: { path: string; key: string }[][] = [];
+	const conflicts: ProjectKey[][] = [];
 
 	const uniqueKeys = keys.filter((keyObj, i, keys) => {
 		return keys.findIndex(i => i.key === keyObj.key) === i;
diff --git a/src/types.ts b/src/types.ts
index 41ba35c..54e0359 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -34,3 +34,10 @@ export interface Structure {
 	schema: { [key: string]: unknown };
 	updated_at: string;
 }
+
+export interface ProjectKey {
+	key: string;
+	file: string;
+	line: number;
+	column: number;
+}