diff --git a/pkgs/development/compilers/llvm/15/default.nix b/pkgs/development/compilers/llvm/15/default.nix
index 8825f860c6161..b729616843d27 100644
--- a/pkgs/development/compilers/llvm/15/default.nix
+++ b/pkgs/development/compilers/llvm/15/default.nix
@@ -88,11 +88,10 @@ let
       python3 = pkgs.python3;  # don't use python-boot
     });
 
-    # Needs package for spinhx-automodapi: https://github.com/astropy/sphinx-automodapi
-    # lldb-manpages = lowPrio (tools.lldb.override {
-    #   enableManpages = true;
-    #   python3 = pkgs.python3;  # don't use python-boot
-    # });
+    lldb-manpages = lowPrio (tools.lldb.override {
+      enableManpages = true;
+      python3 = pkgs.python3;  # don't use python-boot
+    });
 
     # pick clang appropriate for package set we are targeting
     clang =
diff --git a/pkgs/development/compilers/llvm/15/lldb/default.nix b/pkgs/development/compilers/llvm/15/lldb/default.nix
index 1ceca3813fa4e..2b1b377abe5a9 100644
--- a/pkgs/development/compilers/llvm/15/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/15/lldb/default.nix
@@ -116,6 +116,13 @@ stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_SPHINX=ON"
     "-DSPHINX_OUTPUT_MAN=ON"
     "-DSPHINX_OUTPUT_HTML=OFF"
+
+    # docs reference `automodapi` but it's not added to the extensions list when
+    # only building the manpages:
+    # https://github.com/llvm/llvm-project/blob/af6ec9200b09039573d85e349496c4f5b17c3d7f/lldb/docs/conf.py#L54
+    #
+    # so, we just ignore the resulting errors
+    "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
   ] ++ lib.optionals doCheck [
     "-DLLDB_TEST_C_COMPILER=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc"
     "-DLLDB_TEST_CXX_COMPILER=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}c++"