diff --git a/user/ruby3.0-power_assert/APKBUILD b/user/ruby3.0-power_assert/APKBUILD
new file mode 100644
index 0000000..8fe0c06
--- /dev/null
+++ b/user/ruby3.0-power_assert/APKBUILD
@@ -0,0 +1,62 @@
+# Contributor: Jakub Jirutka <jakub@jirutka.cz>
+# Maintainer: Jakub Jirutka <jakub@jirutka.cz>
+pkgname=ruby3.0-power_assert
+_gemname=power_assert
+# Keep version in sync with "Bundled gems" (https://stdgems.org) for the
+# packaged Ruby version.
+pkgver=1.2.0
+pkgrel=0
+pkgdesc="Debug tool for Ruby that displays intermediate results of a method chain"
+url="https://github.com/ruby/power_assert"
+arch="noarch"
+license="BSD-2-Clause AND Ruby"
+depends="ruby3.0"
+checkdepends="ruby3.0-pry ruby3.0-rake ruby3.0-test-unit"
+makedepends="ruby3.0-rdoc"
+subpackages="$pkgname-doc"
+source="https://github.com/ruby/power_assert/archive/v$pkgver/$_gemname-$pkgver.tar.gz
+	gemspec.patch
+	"
+builddir="$srcdir/$_gemname-$pkgver"
+# Avoid circular dependency with ruby-test-unit.
+options="!check"
+
+prepare() {
+	default_prepare
+	sed -i '/require .bundler/d' Rakefile
+}
+
+build() {
+	gem build $_gemname.gemspec
+}
+
+check() {
+	rake test
+}
+
+package() {
+	local gemdir="$pkgdir/$(ruby -e 'puts Gem.default_dir')"
+
+	gem install \
+		--local \
+		--install-dir "$gemdir" \
+		--ignore-dependencies \
+		--document ri \
+		--verbose \
+		$_gemname
+
+	# Remove unnessecary files
+	cd "$gemdir"
+	rm -rf build_info cache extensions plugins
+}
+
+doc() {
+	pkgdesc="$pkgdesc (ri docs)"
+
+	amove "$(ruby -e 'puts Gem.default_dir')"/doc
+}
+
+sha512sums="
+2f001f6223fc3fb586c7b0457f775379040e11eb83b5bdda51c02b2b24e531aecd6e12e6ec80bf9407a768ab1a10b0a6b4c8f1a92ca69ea702faf56202bb635c  power_assert-1.2.0.tar.gz
+ae0ca6ad2990d01d57f95cdce11dc3004b2ace9e79b90bf9eb181bf604bed5992436cb319f923075af951b8e2d31d59f13e15af94c534885d18e033338302524  gemspec.patch
+"
diff --git a/user/ruby3.0-power_assert/gemspec.patch b/user/ruby3.0-power_assert/gemspec.patch
new file mode 100644
index 0000000..81fa904
--- /dev/null
+++ b/user/ruby3.0-power_assert/gemspec.patch
@@ -0,0 +1,23 @@
+--- a/power_assert.gemspec
++++ b/power_assert.gemspec
+@@ -12,11 +12,7 @@
+   s.summary     = "Power Assert for Ruby"
+   s.description = "Power Assert for Ruby. Power Assert shows each value of variables and method calls in the expression. It is useful for testing, providing which value wasn't correct when the condition is not satisfied."
+ 
+-  s.files         = `git ls-files -z`.split("\x0").reject do |f|
+-    f.match(%r{^(test|spec|features|benchmark)/})
+-  end
+-  s.bindir        = 'exe'
+-  s.executables   = s.files.grep(%r{^exe/}) { |f| File.basename(f) }
++  s.files         = Dir['lib/**/*.rb']
+   s.require_paths = ['lib']
+   s.add_development_dependency 'test-unit'
+   s.add_development_dependency 'rake'
+@@ -25,7 +21,6 @@
+   s.add_development_dependency 'pry'
+   s.add_development_dependency 'byebug'
+   s.add_development_dependency 'benchmark-ips'
+-  s.extra_rdoc_files = ['README.rdoc']
+   s.rdoc_options     = ['--main', 'README.rdoc']
+   s.licenses         = ['2-clause BSDL', "Ruby's"]
+ end