diff --git a/SConstruct b/SConstruct
index b759094..5d667f4 100644
--- a/SConstruct
+++ b/SConstruct
@@ -745,9 +745,9 @@ else:
 
 if nix:
     env.Append( CPPFLAGS="-fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch" )
-    if linux:
-        env.Append( CPPFLAGS=" -Werror " )
+    env.Append( CXXFLAGS=os.environ['CXXFLAGS'])
     env.Append( CXXFLAGS=" -Wnon-virtual-dtor " )
+    env.Append( LINKFLAGS=os.environ['LDFLAGS'] )
     env.Append( LINKFLAGS=" -fPIC -pthread -rdynamic" )
     env.Append( LIBS=[] )
 
@@ -757,8 +757,6 @@ if nix:
     if debugBuild:
         env.Append( CPPFLAGS=" -O0 -fstack-protector " );
         env['ENV']['GLIBCXX_FORCE_NEW'] = 1; # play nice with valgrind
-    else:
-        env.Append( CPPFLAGS=" -O3" )
 
     if debugLogging:
         env.Append( CPPFLAGS=" -D_DEBUG" );
dev /usr/local/portage/dev-db/mongodb # cat files/mongodb-1.6.2-fix-shared.patch 
diff --git a/SConstruct b/SConstruct
index 5d667f4..f9d853e 100644
--- a/SConstruct
+++ b/SConstruct
@@ -753,6 +753,7 @@ if nix:
 
     if linux and GetOption( "sharedclient" ):
         env.Append( LINKFLAGS=" -Wl,--as-needed -Wl,-zdefs " )
+        env.Append( SHLINKFLAGS=" -Wl,-soname=libmongoclient.so.1" )
 
     if debugBuild:
         env.Append( CPPFLAGS=" -O0 -fstack-protector " );
@@ -1539,7 +1540,6 @@ if installSetup.clientSrc:
 
 #lib
 if installSetup.libraries:
-    env.Install( installDir + "/" + nixLibPrefix, clientLibName )
     if GetOption( "sharedclient" ): 
         env.Install( installDir + "/" + nixLibPrefix, sharedClientLibName )