diff --git a/pkgs/by-name/li/liblouis/package.nix b/pkgs/by-name/li/liblouis/package.nix
index 082fa6ddfe50..6bfbfbdddd8c 100644
--- a/pkgs/by-name/li/liblouis/package.nix
+++ b/pkgs/by-name/li/liblouis/package.nix
@@ -14,7 +14,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "liblouis";
-  version = "3.33.0";
+  version = "3.38.0";
 
   outputs = [
     "out"
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     owner = "liblouis";
     repo = "liblouis";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-+p/2eLbQ5aYtxQIkoHaVE1xDqstveedf+56aRNX9C7M=";
+    hash = "sha256-OmYMldo2id2HKAM0Hxi6r86khSUnzu22CkJhGBhaaL8=";
   };
 
   strictDeps = true;
@@ -63,7 +63,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   postPatch = ''
     patchShebangs tests
-    substituteInPlace python/louis/__init__.py.in --replace "###LIBLOUIS_SONAME###" "$out/lib/liblouis.so"
+    substituteInPlace python/louis/__init__.py.in \
+      --replace-fail "###LIBLOUIS_SONAME###" "$out/lib/liblouis.so"
   '';
 
   postInstall = ''
@@ -71,6 +72,12 @@ stdenv.mkDerivation (finalAttrs: {
     python -m build --no-isolation --outdir dist/ --wheel
     python -m installer --prefix $out dist/*.whl
     popd
+
+    make install-html MAKEINFOFLAGS="--no-headers --no-split"
+    pushd doc
+    make liblouis.txt
+    popd
+    install -D -t "$doc/share/doc/liblouis" doc/liblouis.txt
   '';
 
   doCheck = true;