diff --git a/contrib/win32/mercurial.iss b/contrib/win32/mercurial.iss
--- a/contrib/win32/mercurial.iss
+++ b/contrib/win32/mercurial.iss
@@ -67,7 +67,7 @@ Source: contrib\mq.el; DestDir: {app}/Co
 Source: contrib\hgweb.fcgi; DestDir: {app}/Contrib
 Source: contrib\hgweb.wsgi; DestDir: {app}/Contrib
 Source: contrib\win32\ReadMe.html; DestDir: {app}; Flags: isreadme
-Source: contrib\win32\mercurial.ini; DestDir: {app}; DestName: Mercurial.ini; Check: CheckFile; AfterInstall: ConcatenateFiles;
+Source: contrib\win32\mercurial.ini; DestDir: {app}; DestName: Mercurial.ini; Check: CheckFile;
 Source: contrib\win32\postinstall.txt; DestDir: {app}; DestName: ReleaseNotes.txt
 Source: dist\hg.exe; DestDir: {app}; AfterInstall: Touch('{app}\hg.exe.local')
 #if ARCH == "x64"
@@ -85,7 +85,7 @@ Source: dist\cacert.pem; Destdir: {app}
 Source: doc\*.html; DestDir: {app}\Docs
 Source: doc\style.css; DestDir: {app}\Docs
 Source: mercurial\help\*.txt; DestDir: {app}\help
-Source: mercurial\default-hgrc.d\*.rc; DestDir: {app}\default-hgrc.d
+Source: mercurial\default.d\*.rc; DestDir: {app}\default.d
 Source: mercurial\locale\*.*; DestDir: {app}\locale; Flags: recursesubdirs createallsubdirs skipifsourcedoesntexist
 Source: mercurial\templates\*.*; DestDir: {app}\Templates; Flags: recursesubdirs createallsubdirs
 Source: CONTRIBUTORS; DestDir: {app}; DestName: Contributors.txt
@@ -131,15 +131,6 @@ begin
   Result := WriteFile;
 end;
 
-procedure ConcatenateFiles();
-var
-  MergeConfigs: TArrayOfString;
-begin
-  if LoadStringsFromFile(ExpandConstant('{tmp}\mergetools.hgrc'),MergeConfigs) then begin
-    SaveStringsToFile(ExpandConstant(CurrentFileName),MergeConfigs,True);
-  end;
-end;
-
 procedure Touch(fn: String);
 begin
   SaveStringToFile(ExpandConstant(fn), '', False);
diff --git a/contrib/wix/mercurial.wxs b/contrib/wix/mercurial.wxs
--- a/contrib/wix/mercurial.wxs
+++ b/contrib/wix/mercurial.wxs
@@ -79,7 +79,7 @@
                     ReadOnly='yes' KeyPath='yes'/>
             </Component>
             <Component Id='mergetools.rc' Guid='$(var.mergetools.rc.guid)' Win64='$(var.IsX64)'>
-              <File Id='mergetools.rc' Name='MergeTools.rc' Source='mercurial\default-hgrc.d\mergetools.rc'
+              <File Id='mergetools.rc' Name='MergeTools.rc' Source='mercurial\default.d\mergetools.rc'
                     ReadOnly='yes' KeyPath='yes'/>
             </Component>
             <Component Id='paths.rc' Guid='$(var.paths.rc.guid)' Win64='$(var.IsX64)'>