diff --git a/reactos/base/applications/network/ftp/ftp.rbuild b/reactos/base/applications/network/ftp/ftp.rbuild
index 854c41b1701..dd43d65f73b 100644
--- a/reactos/base/applications/network/ftp/ftp.rbuild
+++ b/reactos/base/applications/network/ftp/ftp.rbuild
@@ -3,6 +3,18 @@
 <module name="ftp" type="win32cui" installbase="system32" installname="ftp.exe">
 	<include base="ftp">.</include>
 	<define name="lint" />
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="chdir">_chdir</define>
+	<define name="getcwd">_getcwd</define>
+	<define name="mktemp">_mktemp</define>
+	<define name="unlink">_unlink</define>
+	<define name="close">_close</define>
+	<define name="fileno">_fileno</define>
+	<define name="read">_read</define>
+	<define name="write">_write</define>
+	<define name="lseek">_lseek</define>
+
 	<library>kernel32</library>
 	<library>ws2_32</library>
 	<library>iphlpapi</library>
diff --git a/reactos/base/applications/winhlp32/winhlp32.rbuild b/reactos/base/applications/winhlp32/winhlp32.rbuild
index f58dcdb7c3a..3ce9b593d36 100644
--- a/reactos/base/applications/winhlp32/winhlp32.rbuild
+++ b/reactos/base/applications/winhlp32/winhlp32.rbuild
@@ -5,6 +5,11 @@
 	<include base="ReactOS">include/reactos/wine</include>
 	<define name="__ROS_LONG64__" />
     <define name="_CRT_NONSTDC_NO_DEPRECATE" />
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="fileno">_fileno</define>
+	<define name="isatty">_isatty</define>
+
 	<library>wine</library>
 	<library>user32</library>
 	<library>gdi32</library>
diff --git a/reactos/base/services/dhcp/dhcp.rbuild b/reactos/base/services/dhcp/dhcp.rbuild
index 0953ca88e5a..9b3467c06c9 100644
--- a/reactos/base/services/dhcp/dhcp.rbuild
+++ b/reactos/base/services/dhcp/dhcp.rbuild
@@ -3,6 +3,13 @@
 <module name="dhcp" type="win32cui" installbase="system32" installname="dhcp.exe">
 	<include base="dhcp">.</include>
 	<include base="dhcp">include</include>
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="tzset">_tzset</define>
+	<define name="close">_close</define>
+	<define name="read">_read</define>
+	<define name="write">_write</define>
+
 	<library>ntdll</library>
 	<library>kernel32</library>
 	<library>ws2_32</library>
diff --git a/reactos/dll/directx/d3d8/d3d8.rbuild b/reactos/dll/directx/d3d8/d3d8.rbuild
index ee82042391c..3c14ab2b963 100644
--- a/reactos/dll/directx/d3d8/d3d8.rbuild
+++ b/reactos/dll/directx/d3d8/d3d8.rbuild
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
 <module name="d3d8" type="win32dll" entrypoint="0" installbase="system32" installname="d3d8.dll">
-	<importlibrary definition="d3d8.spec.def" />
+	<importlibrary definition="d3d8.spec" />
 	<file>d3d8.c</file>
 	<file>d3d8.rc</file>
 	<file>d3d8.spec</file>
diff --git a/reactos/dll/win32/crtdll/crtdll.rbuild b/reactos/dll/win32/crtdll/crtdll.rbuild
index 1695350d39a..310eaa5851b 100644
--- a/reactos/dll/win32/crtdll/crtdll.rbuild
+++ b/reactos/dll/win32/crtdll/crtdll.rbuild
@@ -1,4 +1,4 @@
-<module name="crtdll" type="win32dll" baseaddress="${BASEADDRESS_CRTDLL}" mangledsymbols="true" installbase="system32" installname="crtdll.dll" iscrt="true">
+<module name="crtdll" type="win32dll" baseaddress="${BASEADDRESS_CRTDLL}" installbase="system32" installname="crtdll.dll" iscrt="true">
 	<importlibrary definition="crtdll.spec" />
 	<include base="crtdll">.</include>
 	<include base="crt">include</include>
diff --git a/reactos/dll/win32/crypt32/crypt32.rbuild b/reactos/dll/win32/crypt32/crypt32.rbuild
index 6b91352df3d..a8e7c3effbd 100644
--- a/reactos/dll/win32/crypt32/crypt32.rbuild
+++ b/reactos/dll/win32/crypt32/crypt32.rbuild
@@ -4,6 +4,12 @@
 	<include base="ReactOS">include/reactos/wine</include>
 	<define name="__WINESRC__" />
 	<redefine name="_WIN32_WINNT">0x600</redefine>
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="fdopen">_fdopen</define>
+	<define name="open">_open</define>
+	<define name="close">_close</define>
+
 	<library>wine</library>
 	<library>user32</library>
 	<library>advapi32</library>
diff --git a/reactos/dll/win32/mshtml/mshtml.rbuild b/reactos/dll/win32/mshtml/mshtml.rbuild
index f97b9864820..240d54817b3 100644
--- a/reactos/dll/win32/mshtml/mshtml.rbuild
+++ b/reactos/dll/win32/mshtml/mshtml.rbuild
@@ -1,13 +1,18 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
 <group>
-<module name="mshtml" type="win32dll" baseaddress="${BASEADDRESS_MSHTML}" installbase="system32" installname="mshtml.dll" allowwarnings="true">
+<module name="mshtml" type="win32dll" baseaddress="${BASEADDRESS_MSHTML}" installbase="system32" installname="mshtml.dll" allowwarnings="true" crt="msvcrt">
 	<autoregister infsection="OleControlDlls" type="Both" />
 	<importlibrary definition="mshtml.spec" />
 	<include base="mshtml">.</include>
 	<include base="ReactOS">include/reactos/wine</include>
 	<define name="__WINESRC__" />
 	<redefine name="_WIN32_WINNT">0x600</redefine>
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="open">_open</define>
+	<define name="close">_close</define>
+
 	<file>conpoint.c</file>
 	<file>dispex.c</file>
 	<file>editor.c</file>
diff --git a/reactos/dll/win32/msvcrt/msvcrt.def b/reactos/dll/win32/msvcrt/msvcrt.def
index 4a35b1bfd92..bcf3fe378c8 100644
--- a/reactos/dll/win32/msvcrt/msvcrt.def
+++ b/reactos/dll/win32/msvcrt/msvcrt.def
@@ -365,9 +365,10 @@ EXPORTS
   _isnan @359
   _itoa @360
   _itow @361
-  _j0 @362
-  _j1 @363
-  _jn @364
+; FIXME: these aren't actually implemented in CRT
+; _j0 @362
+; _j1 @363
+; _jn @364
   _kbhit @365
   _lfind @366
   _loaddll @367
@@ -648,9 +649,10 @@ EXPORTS
   _wunlink @642
   _wutime @643
 ;  _wutime64 @644
-  _y0 @645
-  _y1 @646
-  _yn @647
+; FIXME: these aren't actually implemented in CRT
+; _y0 @645
+; _y1 @646
+; _yn @647
   abort @648
   abs @649
   acos @650
diff --git a/reactos/dll/win32/msvcrt/msvcrt.rbuild b/reactos/dll/win32/msvcrt/msvcrt.rbuild
index 9c3f9ef08cf..6e6677f2492 100644
--- a/reactos/dll/win32/msvcrt/msvcrt.rbuild
+++ b/reactos/dll/win32/msvcrt/msvcrt.rbuild
@@ -1,4 +1,4 @@
-<module name="msvcrt" type="win32dll" baseaddress="${BASEADDRESS_MSVCRT}" mangledsymbols="true" installbase="system32" installname="msvcrt.dll" iscrt="yes">
+<module name="msvcrt" type="win32dll" baseaddress="${BASEADDRESS_MSVCRT}" installbase="system32" installname="msvcrt.dll" iscrt="yes">
 	<importlibrary definition="msvcrt.def" />
 	<include base="msvcrt">.</include>
 	<include base="crt">include</include>
diff --git a/reactos/dll/win32/setupapi/setupapi.rbuild b/reactos/dll/win32/setupapi/setupapi.rbuild
index 170ec09bbf6..e2d901474c6 100644
--- a/reactos/dll/win32/setupapi/setupapi.rbuild
+++ b/reactos/dll/win32/setupapi/setupapi.rbuild
@@ -5,6 +5,10 @@
 	<include base="setupapi">.</include>
 	<include base="ReactOS">include/reactos/wine</include>
 	<include base="pnp_client">.</include>
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="wcsnicmp">_wcsnicmp</define>
+
 	<define name="_SETUPAPI_" />
 	<library>pnp_client</library>
 	<library>uuid</library>
diff --git a/reactos/dll/win32/wininet/wininet.rbuild b/reactos/dll/win32/wininet/wininet.rbuild
index 21a504564bc..1bb2b3bee40 100644
--- a/reactos/dll/win32/wininet/wininet.rbuild
+++ b/reactos/dll/win32/wininet/wininet.rbuild
@@ -8,6 +8,10 @@
 	<include base="ReactOS">include/reactos/wine</include>
 	<define name="__WINESRC__" />
 	<define name="_WINE" />
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="close">_close</define>
+
 	<library>wine</library>
 	<library>mpr</library>
 	<library>shlwapi</library>
diff --git a/reactos/lib/3rdparty/bzip2/bzip2.rbuild b/reactos/lib/3rdparty/bzip2/bzip2.rbuild
index 3437902a950..f161228aa47 100644
--- a/reactos/lib/3rdparty/bzip2/bzip2.rbuild
+++ b/reactos/lib/3rdparty/bzip2/bzip2.rbuild
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
-<module name="bzip2" type="kernelmodedll" installbase="system32/drivers" installname="bzip2.dll">
+<module name="bzip2" type="kernelmodedll" installbase="system32/drivers" installname="unbzip2.dll">
 	<importlibrary definition="unbzip2.def" />
 	<define name="BZ_NO_STDIO" />
 	<define name="BZ_DECOMPRESS_ONLY" />
diff --git a/reactos/lib/3rdparty/libxml2/libxml2.rbuild b/reactos/lib/3rdparty/libxml2/libxml2.rbuild
index b2631669abc..fab226e9bb4 100644
--- a/reactos/lib/3rdparty/libxml2/libxml2.rbuild
+++ b/reactos/lib/3rdparty/libxml2/libxml2.rbuild
@@ -11,6 +11,14 @@
 	<define name="__MINGW32__" />
 	<include base="libxml2">include</include>
 	<include base="libxml2">.</include>
+
+	<!-- FIXME: workarounds until we have a proper oldnames library -->
+	<define name="getcwd">_getcwd</define>
+	<define name="close">_close</define>
+	<define name="write">_write</define>
+	<define name="read">_read</define>
+	<define name="open">_open</define>
+
 	<file>c14n.c</file>
 	<file>catalog.c</file>
 	<file>chvalid.c</file>
diff --git a/reactos/lib/3rdparty/mingw/mingw.rbuild b/reactos/lib/3rdparty/mingw/mingw.rbuild
index c41e7a4b325..0e87ee7971b 100644
--- a/reactos/lib/3rdparty/mingw/mingw.rbuild
+++ b/reactos/lib/3rdparty/mingw/mingw.rbuild
@@ -1,9 +1,8 @@
 <?xml version="1.0"?>
 <!DOCTYPE group SYSTEM "../../../tools/rbuild/project.dtd">
 <group>
-<module name="mingw_common" type="staticlibrary" isstartuplib="true" underscoresymbols="true" crt="dll">
+<module name="mingw_common" type="staticlibrary" isstartuplib="true" crt="dll">
 	<define name="_CRTBLD" />
-	<importlibrary definition="moldname-msvcrt.def" dllname="msvcrt.dll" />
 	<include base="ReactOS">include/reactos/mingw-w64</include>
 	<library>kernel32</library>
 	<file>_newmode.c</file>
diff --git a/reactos/lib/sdk/crt/crt.rbuild b/reactos/lib/sdk/crt/crt.rbuild
index 319b0ba66a5..73a88a029e4 100644
--- a/reactos/lib/sdk/crt/crt.rbuild
+++ b/reactos/lib/sdk/crt/crt.rbuild
@@ -155,9 +155,10 @@
 				<file>fmod.c</file>
 				<file>ldexp.c</file>
 			</directory>
-			<file>j0_y0.c</file>
+			<!-- FIXME: we don't actually implement these... they recursively call themselves through an alias -->
+			<!--<file>j0_y0.c</file>
 			<file>j1_y1.c</file>
-			<file>jn_yn.c</file>
+			<file>jn_yn.c</file>-->
 		</if>
 		<if property="ARCH" value="amd64">
 			<directory name="i386">
@@ -166,9 +167,10 @@
 				<file>fmod.c</file>
 				<file>ldexp.c</file>
 			</directory>
-			<file>j0_y0.c</file>
+			<!-- FIXME: we don't actually implement these... they recursively call themselves through an alias -->
+			<!--<file>j0_y0.c</file>
 			<file>j1_y1.c</file>
-			<file>jn_yn.c</file>
+			<file>jn_yn.c</file>-->
 		</if>
 		<ifnot property="ARCH" value="i386">
 			<file>stubs.c</file>