diff --git a/posix.mak b/posix.mak
index b371bdaeed..6678715d9e 100644
--- a/posix.mak
+++ b/posix.mak
@@ -231,7 +231,7 @@ UT_MODULES:=$(patsubst src/%.d,$(ROOT)/unittest/%,$(SRCS))
 HAS_ADDITIONAL_TESTS:=$(shell test -d test && echo 1)
 ifeq ($(HAS_ADDITIONAL_TESTS),1)
 	ADDITIONAL_TESTS:=test/init_fini test/exceptions test/coverage test/profile test/cycles test/allocations test/typeinfo \
-	    test/thread test/unittest
+	    test/thread test/unittest test/imports
 	ADDITIONAL_TESTS+=$(if $(SHARED),test/shared,)
 endif
 
@@ -241,7 +241,7 @@ unittest : $(UT_MODULES) $(addsuffix /.run,$(ADDITIONAL_TESTS))
 	@echo done
 else
 unittest : unittest-debug unittest-release
-unittest-%:
+unittest-%: target
 	$(MAKE) -f $(MAKEFILE) unittest OS=$(OS) MODEL=$(MODEL) DMD=$(DMD) BUILD=$*
 endif
 
diff --git a/src/core/runtime.d b/src/core/runtime.d
index ab995882e1..b9b3573293 100644
--- a/src/core/runtime.d
+++ b/src/core/runtime.d
@@ -650,13 +650,18 @@ extern (C) UnitTestResult runModuleUnitTests()
             }
         }
     }
-    import rt.config : rt_configOption;
+
+    import core.internal.traits : externDFunc;
+    alias rt_configCallBack = string delegate(string) @nogc nothrow;
+    alias fn_configOption = string function(string opt, scope rt_configCallBack dg, bool reverse) @nogc nothrow;
+    alias rt_configOption = externDFunc!("rt.config.rt_configOption", fn_configOption);
+
     if (results.passed != results.executed)
     {
         // by default, we always print a summary if there are failures.
         results.summarize = true;
     }
-    else switch (rt_configOption("testmode"))
+    else switch (rt_configOption("testmode", null, false))
     {
     case "":
         // By default, run main. Switch to only doing unit tests in 2.080
@@ -674,7 +679,7 @@ extern (C) UnitTestResult runModuleUnitTests()
         results.summarize = !results.runMain;
         break;
     default:
-        throw new Error("Unknown --DRT-testmode option: " ~ rt_configOption("testmode"));
+        throw new Error("Unknown --DRT-testmode option: " ~ rt_configOption("testmode", null, false));
     }
 
     return results;
diff --git a/src/core/thread.d b/src/core/thread.d
index f69defca35..6379e6c6bd 100644
--- a/src/core/thread.d
+++ b/src/core/thread.d
@@ -304,7 +304,6 @@ else version( Posix )
         {
             version (Shared)
             {
-                import rt.sections;
                 Thread obj = cast(Thread)(cast(void**)arg)[0];
                 auto loadedLibraries = (cast(void**)arg)[1];
                 .free(arg);
@@ -317,7 +316,11 @@ else version( Posix )
 
             // loadedLibraries need to be inherited from parent thread
             // before initilizing GC for TLS (rt_tlsgc_init)
-            version (Shared) inheritLoadedLibraries(loadedLibraries);
+            version (Shared)
+            {
+                externDFunc!("rt.sections_elf_shared.inheritLoadedLibraries",
+                             void function(void*) @nogc nothrow)(loadedLibraries);
+            }
 
             assert( obj.m_curr is &obj.m_main );
             obj.m_main.bstack = getStackBottom();
@@ -404,7 +407,11 @@ else version( Posix )
                     append( t );
                 }
                 rt_moduleTlsDtor();
-                version (Shared) cleanupLoadedLibraries();
+                version (Shared)
+                {
+                    externDFunc!("rt.sections_elf_shared.cleanupLoadedLibraries",
+                                 void function() @nogc nothrow)();
+                }
             }
             catch( Throwable t )
             {
@@ -712,15 +719,17 @@ class Thread
 
                 version (Shared)
                 {
-                    import rt.sections;
-                    auto libs = pinLoadedLibraries();
+                    auto libs = externDFunc!("rt.sections_elf_shared.pinLoadedLibraries",
+                                             void* function() @nogc nothrow)();
+
                     auto ps = cast(void**).malloc(2 * size_t.sizeof);
                     if (ps is null) onOutOfMemoryError();
                     ps[0] = cast(void*)this;
                     ps[1] = cast(void*)libs;
                     if( pthread_create( &m_addr, &attr, &thread_entryPoint, ps ) != 0 )
                     {
-                        unpinLoadedLibraries(libs);
+                        externDFunc!("rt.sections_elf_shared.unpinLoadedLibraries",
+                                     void function(void*) @nogc nothrow)(libs);
                         .free(ps);
                         onThreadError( "Error creating thread" );
                     }
diff --git a/test/imports/Makefile b/test/imports/Makefile
new file mode 100644
index 0000000000..e4f6766888
--- /dev/null
+++ b/test/imports/Makefile
@@ -0,0 +1,14 @@
+include ../common.mak
+
+TESTS:=bug18193
+
+.PHONY: all clean
+all: $(addprefix $(ROOT)/,$(addsuffix .done,$(TESTS)))
+
+$(ROOT)/%.done:
+	@echo Testing $*
+	@mkdir -p $(basename $@)
+	$(QUIET)$(DMD) -version=Shared -o- -deps=$@ -Isrc -I../../import src/$*
+
+clean:
+	rm -rf $(GENERATED)
diff --git a/test/imports/src/bug18193.d b/test/imports/src/bug18193.d
new file mode 100644
index 0000000000..bd3fd521d0
--- /dev/null
+++ b/test/imports/src/bug18193.d
@@ -0,0 +1,2 @@
+import core.runtime;
+import core.thread;