diff --git a/app-doc/mathjax-docs/mathjax-docs-2.7.7.ebuild b/app-doc/mathjax-docs/mathjax-docs-2.7.7.ebuild
index 783ab0bca1ebb..6706659e7acf4 100644
--- a/app-doc/mathjax-docs/mathjax-docs-2.7.7.ebuild
+++ b/app-doc/mathjax-docs/mathjax-docs-2.7.7.ebuild
@@ -10,14 +10,16 @@ COMMIT="9d711f40638202b02f2154d7f05ea35088ff9388"
 DESCRIPTION="MathJax documentation"
 HOMEPAGE="https://www.mathjax.org/"
 SRC_URI="https://github.com/mathjax/MathJax-docs/archive/${COMMIT}.tar.gz -> ${P}.tar.gz"
+S="${WORKDIR}/MathJax-docs-${COMMIT}"
 
 LICENSE="Apache-2.0"
 SLOT="0"
 KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86 ~amd64-linux ~x86-linux ~x64-macos"
 
-DEPEND="dev-python/sphinx"
-
-S=${WORKDIR}/MathJax-docs-${COMMIT}
+BDEPEND="
+	dev-python/sphinx
+	dev-python/sphinx_rtd_theme
+"
 
 src_prepare() {
 	default