diff --git a/pkgs/applications/version-management/git-and-tools/git/default.nix b/pkgs/applications/version-management/git-and-tools/git/default.nix
index 8ad150f1306..53ac8a0d1a0 100644
--- a/pkgs/applications/version-management/git-and-tools/git/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git/default.nix
@@ -2,7 +2,7 @@
 , curl, openssl, zlib, expat, perlPackages, python3, gettext, cpio
 , gnugrep, gnused, gawk, coreutils # needed at runtime by git-filter-branch etc
 , openssh, pcre2
-, asciidoctor, texinfo, xmlto, docbook2x, docbook_xsl, docbook_xsl_ns, docbook_xml_dtd_45
+, asciidoc, texinfo, xmlto, docbook2x, docbook_xsl, docbook_xml_dtd_45
 , libxslt, tcl, tk, makeWrapper, libiconv
 , svnSupport, subversionClient, perlLibs, smtpPerlLibs
 , perlSupport ? stdenv.buildPlatform == stdenv.hostPlatform
@@ -68,8 +68,8 @@ stdenv.mkDerivation {
   '';
 
   nativeBuildInputs = [ gettext perlPackages.perl makeWrapper ]
-    ++ lib.optionals withManual [ asciidoctor texinfo xmlto docbook2x
-         docbook_xsl docbook_xsl_ns docbook_xml_dtd_45 libxslt ];
+    ++ lib.optionals withManual [ asciidoc texinfo xmlto docbook2x
+         docbook_xsl docbook_xml_dtd_45 libxslt ];
   buildInputs = [curl openssl zlib expat cpio libiconv]
     ++ lib.optionals perlSupport [ perlPackages.perl ]
     ++ lib.optionals guiSupport [tcl tk]
@@ -148,7 +148,7 @@ stdenv.mkDerivation {
       }
 
       # Install git-subtree.
-      make -C contrib/subtree install ${lib.optionalString withManual "USE_ASCIIDOCTOR=1 install-doc"}
+      make -C contrib/subtree install ${lib.optionalString withManual "install-doc"}
       rm -rf contrib/subtree
 
       # Install contrib stuff.
@@ -233,7 +233,7 @@ stdenv.mkDerivation {
       '')
 
    + lib.optionalString withManual ''# Install man pages
-       make -j $NIX_BUILD_CORES -l $NIX_BUILD_CORES USE_ASCIIDOCTOR=1 PERL_PATH="${buildPackages.perl}/bin/perl" cmd-list.made install install-html \
+       make -j $NIX_BUILD_CORES -l $NIX_BUILD_CORES PERL_PATH="${buildPackages.perl}/bin/perl" cmd-list.made install install-html \
          -C Documentation ''
 
    + (if guiSupport then ''
diff --git a/pkgs/development/libraries/libndctl/default.nix b/pkgs/development/libraries/libndctl/default.nix
index 91a2c378c03..6e82191e755 100644
--- a/pkgs/development/libraries/libndctl/default.nix
+++ b/pkgs/development/libraries/libndctl/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, autoreconfHook
-, asciidoctor, pkg-config, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt
+, asciidoc, pkg-config, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt
 , json_c, kmod, which, util-linux, udev, keyutils
 }:
 
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "lib" "man" "dev" ];
 
   nativeBuildInputs =
-    [ autoreconfHook asciidoctor pkg-config xmlto docbook_xml_dtd_45 docbook_xsl libxslt
+    [ autoreconfHook asciidoc pkg-config xmlto docbook_xml_dtd_45 docbook_xsl libxslt
       which
     ];
 
@@ -28,6 +28,7 @@ stdenv.mkDerivation rec {
   configureFlags =
     [ "--without-bash"
       "--without-systemd"
+      "--disable-asciidoctor" # depends on ruby 2.7, use asciidoc instead
     ];
 
   patchPhase = ''