diff --git a/api/build.gradle b/api/build.gradle
index 32b37d1..8a11427 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -7,6 +7,7 @@ plugins {
 
 repositories {
     mavenCentral()
+    mavenLocal()
 }
 
 configurations {
@@ -17,10 +18,10 @@ configurations {
 
 dependencies {
     api libs.groovy
+    api libs.groowt.all
 
     compileOnlyApi libs.jetbrains.anontations
 
-    api libs.groovy
     implementation libs.groovy.templates
     implementation libs.commonmark
     implementation libs.commonmark.frontmatter
diff --git a/buildSrc/src/main/groovy/ssg-common.gradle b/buildSrc/src/main/groovy/ssg-common.gradle
index cb6589c..4cc64fb 100644
--- a/buildSrc/src/main/groovy/ssg-common.gradle
+++ b/buildSrc/src/main/groovy/ssg-common.gradle
@@ -29,6 +29,12 @@ dependencies {
     testing libs.mockito.junit.jupiter
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
 testing {
     suites {
         test {
diff --git a/cli/build.gradle b/cli/build.gradle
index fb914f1..2ef39b4 100644
--- a/cli/build.gradle
+++ b/cli/build.gradle
@@ -6,6 +6,7 @@ plugins {
 
 repositories {
     mavenCentral()
+    mavenLocal()
 }
 
 dependencies {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b8c5504..c51297d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,6 +1,7 @@
 [versions]
 commonmark = '0.22.0'
 groovy = '4.0.21'
+groowt = '0.1.0'
 log4j2 = '2.23.1'
 mockito = '5.12.0'
 junit = '5.10.2'
@@ -10,6 +11,7 @@ commonmark = { module = 'org.commonmark:commonmark', version.ref = 'commonmark'
 commonmark-frontmatter = { module = 'org.commonmark:commonmark-ext-yaml-front-matter', version.ref = 'commonmark' }
 groovy = { module = 'org.apache.groovy:groovy', version.ref = 'groovy' }
 groovy-templates = { module = 'org.apache.groovy:groovy-templates', version.ref = 'groovy' }
+groowt-all = { module = 'groowt:groowt-all', version.ref = 'groowt' }
 jetbrains-anontations = 'org.jetbrains:annotations:24.1.0'
 jsoup = 'org.jsoup:jsoup:1.17.2'
 junit-jupiter-api = { module = 'org.junit.jupiter:junit-jupiter-api', version.ref = 'junit' }
diff --git a/ssg-0.4.0.md b/ssg-0.4.0.md
index 2ff93d2..43e5469 100644
--- a/ssg-0.4.0.md
+++ b/ssg-0.4.0.md
@@ -26,3 +26,8 @@ Have the following layout of dirs and files. It is a combined gradle/ssg project
 - texts: a general folder for texts and other textual data, can be .md, .txt, .html, etc.
 - build.gradle: the root project build.gradle 
 - settings.gradle: the usual gradle settings
+
+## Api TODO
+- [ ] Move from `Provider`/`Property` in `api` to `groowt.util.provider`.
+- [ ] Move from all the fp-util stuff to `groowt.util.fp`.
+- [ ] Get rid of graph-dependency.