diff --git a/packages/api-client/env.d.ts b/packages/api-client/env.d.ts
new file mode 100644
index 0000000..872142a
--- /dev/null
+++ b/packages/api-client/env.d.ts
@@ -0,0 +1,6 @@
+namespace NodeJS {
+  interface ProcessEnv {
+    NODE_ENV: string;
+    NEXT_PUBLIC_BASE_API_URL: string;
+  }
+}
diff --git a/packages/api-client/helpers.ts b/packages/api-client/helpers.ts
index 666d399..afc847f 100644
--- a/packages/api-client/helpers.ts
+++ b/packages/api-client/helpers.ts
@@ -1 +1,2 @@
-export const apiURL = (value: string) => process.env.NEXT_PUBLIC_BASE_API_URL + value;
+const PUBLIC_BASE_API_URL = process.env.NEXT_PUBLIC_BASE_API_URL ?? '/api';
+export const apiURL = (value: string) => PUBLIC_BASE_API_URL + value;
diff --git a/packages/api-client/tsconfig.json b/packages/api-client/tsconfig.json
index f5b8565..a5da965 100644
--- a/packages/api-client/tsconfig.json
+++ b/packages/api-client/tsconfig.json
@@ -10,7 +10,7 @@
     "noFallthroughCasesInSwitch": true
   },
   "files": [],
-  "include": [],
+  "include": ["env.d.ts"],
   "references": [
     {
       "path": "./tsconfig.lib.json"
diff --git a/packages/graphql/schema/index.ts b/packages/graphql/schema/index.ts
index 7a3b227..07730c8 100644
--- a/packages/graphql/schema/index.ts
+++ b/packages/graphql/schema/index.ts
@@ -1,3 +1,5 @@
+import { GraphQLSchema } from 'graphql/type';
+
 import { builder } from '../builder';
 import '../types';
 import './environment';
@@ -6,4 +8,5 @@ import './service';
 import './serviceVersion';
 import './version';
 
-export default builder.toSchema();
+const schema: GraphQLSchema = builder.toSchema();
+export default schema;
diff --git a/packages/prisma/env.d.ts b/packages/prisma/env.d.ts
new file mode 100644
index 0000000..769675c
--- /dev/null
+++ b/packages/prisma/env.d.ts
@@ -0,0 +1,5 @@
+namespace NodeJS {
+  interface ProcessEnv {
+    NODE_ENV: string;
+  }
+}
diff --git a/packages/prisma/tsconfig.json b/packages/prisma/tsconfig.json
index f5b8565..a5da965 100644
--- a/packages/prisma/tsconfig.json
+++ b/packages/prisma/tsconfig.json
@@ -10,7 +10,7 @@
     "noFallthroughCasesInSwitch": true
   },
   "files": [],
-  "include": [],
+  "include": ["env.d.ts"],
   "references": [
     {
       "path": "./tsconfig.lib.json"