--- SConstruct	
+++ SConstruct	
@@ -811,19 +811,17 @@ if nix:
     # -Winvalid-pch Warn if a precompiled header (see Precompiled Headers) is found in the search path but can't be used.
     env.Append( CCFLAGS=["-fPIC",
                          "-fno-strict-aliasing",
-                         "-ggdb",
                          "-pthread",
                          "-Wall",
                          "-Wsign-compare",
                          "-Wno-unknown-pragmas",
                          "-Winvalid-pch"] )
     # env.Append( " -Wconversion" ) TODO: this doesn't really work yet
-    if linux or darwin:
-        env.Append( CCFLAGS=["-Werror", "-pipe"] )
 
     env.Append( CPPDEFINES=["_FILE_OFFSET_BITS=64"] )
-    env.Append( CXXFLAGS=["-Wnon-virtual-dtor", "-Woverloaded-virtual"] )
     env.Append( LINKFLAGS=["-fPIC", "-pthread"] )
+    env.Append( CXXFLAGS=os.environ['CXXFLAGS'])
+    env.Append( LINKFLAGS=os.environ['LDFLAGS'] )
 
     # SERVER-9761: Ensure early detection of missing symbols in dependent libraries at program
     # startup.
@@ -840,7 +838,7 @@ if nix:
     if not darwin:
         env.Append( LINKFLAGS=["-rdynamic"] )
 
-    env.Append( LIBS=[] )
+    env.Append( LIBS=['pcre', 'pcrecpp', 'snappy'] )
 
     #make scons colorgcc friendly
     for key in ('HOME', 'TERM'):