diff --git a/lib/modules/manager/mix/extract.spec.ts b/lib/modules/manager/mix/extract.spec.ts
index 37d7c990e60585..a20ea0327fd715 100644
--- a/lib/modules/manager/mix/extract.spec.ts
+++ b/lib/modules/manager/mix/extract.spec.ts
@@ -20,14 +20,14 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 0.8.1',
           datasource: 'hex',
           depName: 'postgrex',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'postgrex',
         },
         {
           currentValue: '<1.7.0 or ~>1.7.1',
           datasource: 'hex',
           depName: 'ranch',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'ranch',
         },
         {
@@ -35,7 +35,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '0.6.0',
           datasource: 'github-tags',
           depName: 'cowboy',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'ninenines/cowboy',
         },
         {
@@ -43,7 +43,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: 'main',
           datasource: 'git-tags',
           depName: 'phoenix',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'https://github.com/phoenixframework/phoenix.git',
         },
         {
@@ -51,49 +51,49 @@ describe('modules/manager/mix/extract', () => {
           currentValue: undefined,
           datasource: 'github-tags',
           depName: 'ecto',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'elixir-ecto/ecto',
         },
         {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'secret',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'secret:acme',
         },
         {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'also_secret',
-          depType: 'devDependencies',
+          depType: 'dev',
           packageName: 'also_secret:acme',
         },
         {
           currentValue: '>0.2.0 and <=1.0.0',
           datasource: 'hex',
           depName: 'metrics',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'metrics',
         },
         {
           currentValue: '>= 1.0.0',
           datasource: 'hex',
           depName: 'jason',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'jason',
         },
         {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'hackney',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'hackney',
         },
         {
           currentValue: '~> 6.1',
           datasource: 'hex',
           depName: 'hammer_backend_redis',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'hammer_backend_redis',
         },
         {
@@ -101,28 +101,28 @@ describe('modules/manager/mix/extract', () => {
           currentVersion: '1.0.10',
           datasource: 'hex',
           depName: 'castore',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'castore',
         },
         {
           currentValue: '~> 2.0.0',
           datasource: 'hex',
           depName: 'gun',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'grpc_gun',
         },
         {
           currentValue: '~> 0.4.0',
           datasource: 'hex',
           depName: 'another_gun',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'raygun',
         },
         {
           currentValue: '~> 1.7',
           datasource: 'hex',
           depName: 'credo',
-          depType: 'devDependencies',
+          depType: 'dev',
           packageName: 'credo',
         },
         {
@@ -130,7 +130,7 @@ describe('modules/manager/mix/extract', () => {
           currentVersion: '0.37.0',
           datasource: 'hex',
           depName: 'floki',
-          depType: 'devDependencies',
+          depType: 'dev',
           packageName: 'floki',
         },
       ]);
@@ -145,7 +145,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 0.8.1',
           datasource: 'hex',
           depName: 'postgrex',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'postgrex',
           lockedVersion: '0.8.4',
         },
@@ -153,7 +153,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '<1.7.0 or ~>1.7.1',
           datasource: 'hex',
           depName: 'ranch',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'ranch',
           lockedVersion: '1.7.1',
         },
@@ -162,7 +162,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '0.6.0',
           datasource: 'github-tags',
           depName: 'cowboy',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'ninenines/cowboy',
           lockedVersion: '0.6.0',
         },
@@ -171,7 +171,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: 'main',
           datasource: 'git-tags',
           depName: 'phoenix',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'https://github.com/phoenixframework/phoenix.git',
           lockedVersion: undefined,
         },
@@ -180,7 +180,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: undefined,
           datasource: 'github-tags',
           depName: 'ecto',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'elixir-ecto/ecto',
           lockedVersion: undefined,
         },
@@ -188,7 +188,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'secret',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'secret:acme',
           lockedVersion: '1.5.0',
         },
@@ -196,7 +196,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'also_secret',
-          depType: 'devDependencies',
+          depType: 'dev',
           packageName: 'also_secret:acme',
           lockedVersion: '1.3.4',
         },
@@ -204,7 +204,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '>0.2.0 and <=1.0.0',
           datasource: 'hex',
           depName: 'metrics',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'metrics',
           lockedVersion: '1.0.0',
         },
@@ -212,7 +212,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '>= 1.0.0',
           datasource: 'hex',
           depName: 'jason',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'jason',
           lockedVersion: '1.4.4',
         },
@@ -220,7 +220,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 1.0',
           datasource: 'hex',
           depName: 'hackney',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'hackney',
           lockedVersion: '1.20.1',
         },
@@ -228,7 +228,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 6.1',
           datasource: 'hex',
           depName: 'hammer_backend_redis',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'hammer_backend_redis',
           lockedVersion: '6.2.0',
         },
@@ -237,7 +237,7 @@ describe('modules/manager/mix/extract', () => {
           currentVersion: '1.0.10',
           datasource: 'hex',
           depName: 'castore',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'castore',
           lockedVersion: '1.0.10',
         },
@@ -245,7 +245,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 2.0.0',
           datasource: 'hex',
           depName: 'gun',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'grpc_gun',
           lockedVersion: '2.0.1',
         },
@@ -253,7 +253,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 0.4.0',
           datasource: 'hex',
           depName: 'another_gun',
-          depType: 'dependencies',
+          depType: 'prod',
           packageName: 'raygun',
           lockedVersion: '0.4.0',
         },
@@ -261,7 +261,7 @@ describe('modules/manager/mix/extract', () => {
           currentValue: '~> 1.7',
           datasource: 'hex',
           depName: 'credo',
-          depType: 'devDependencies',
+          depType: 'dev',
           packageName: 'credo',
           lockedVersion: '1.7.10',
         },
@@ -270,7 +270,7 @@ describe('modules/manager/mix/extract', () => {
           currentVersion: '0.37.0',
           datasource: 'hex',
           depName: 'floki',
-          depType: 'devDependencies',
+          depType: 'dev',
           lockedVersion: '0.37.0',
           packageName: 'floki',
         },
diff --git a/lib/modules/manager/mix/extract.ts b/lib/modules/manager/mix/extract.ts
index c28ab016bcef51..663b6cce6becc0 100644
--- a/lib/modules/manager/mix/extract.ts
+++ b/lib/modules/manager/mix/extract.ts
@@ -61,7 +61,7 @@ export async function extractPackageFile(
 
         const dep: PackageDependency = {
           depName: app,
-          depType: 'dependencies',
+          depType: 'prod',
         };
 
         if (git ?? github) {
@@ -86,7 +86,7 @@ export async function extractPackageFile(
         }
 
         if (onlyValue !== undefined && !onlyEnvironments.includes('prod')) {
-          dep.depType = 'devDependencies';
+          dep.depType = 'dev';
         }
 
         deps.set(app, dep);
diff --git a/lib/modules/manager/mix/readme.md b/lib/modules/manager/mix/readme.md
index 803601d38711e0..7fbafcb30d9418 100644
--- a/lib/modules/manager/mix/readme.md
+++ b/lib/modules/manager/mix/readme.md
@@ -1,8 +1,8 @@
-The `mix` manager extracts dependencies for the `hex` datasource and uses Renovate's implementation of Hex SemVer to evaluate updates.
+The `mix` manager extracts prod for the `hex` datasource and uses Renovate's implementation of Hex SemVer to evaluate updates.
 
 The `mix` package manager itself is also used to keep the lock file up-to-date.
 
-The following `depTypes` are currently supported by the npm manager :
+The following `depTypes` are currently supported by the mix manager :
 
-- `dependencies`
-- `devDependencies`
+- `prod`: all dependencies by default
+- `dev`: dependencies with [`:only` option](https://hexdocs.pm/mix/1.18.1/Mix.Tasks.Deps.html#module-dependency-definition-options) not containing `:prod`