diff --git a/SmithyDafnyMakefile.mk b/SmithyDafnyMakefile.mk
index ea3a25405..90d3230f3 100644
--- a/SmithyDafnyMakefile.mk
+++ b/SmithyDafnyMakefile.mk
@@ -209,7 +209,7 @@ transpile_implementation:
 		$(DAFNY_OTHER_FILES) \
 		$(TRANSPILE_MODULE_NAME) \
 		$(if $(strip $(STD_LIBRARY)) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/src/Index.dfy, ) \
-		$(if $(USE_DAFNY_STANDARD_LIBRARIES) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ) \
+		$(if $(USE_DAFNY_STANDARD_LIBRARIES) , $(if $(strip $(STD_LIBRARY)) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ), ) \
 		$(TRANSLATION_RECORD) \
 		$(TRANSPILE_DEPENDENCIES)
 
@@ -248,7 +248,7 @@ transpile_test:
 		$(DAFNY_OPTIONS) \
 		$(DAFNY_OTHER_FILES) \
 		$(if $(strip $(STD_LIBRARY)) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/src/Index.dfy, ) \
-		$(if $(USE_DAFNY_STANDARD_LIBRARIES) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ) \
+		$(if $(USE_DAFNY_STANDARD_LIBRARIES) , $(if $(strip $(STD_LIBRARY)) , --library:$(PROJECT_ROOT)/$(STD_LIBRARY)/bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ), ) \
 		$(TRANSLATION_RECORD) \
 		$(SOURCE_TRANSLATION_RECORD) \
 		$(TRANSPILE_MODULE_NAME) \
diff --git a/TestModels/dafny-dependencies/StandardLibrary/Makefile b/TestModels/dafny-dependencies/StandardLibrary/Makefile
index f3984ba7f..f4d1c2d32 100644
--- a/TestModels/dafny-dependencies/StandardLibrary/Makefile
+++ b/TestModels/dafny-dependencies/StandardLibrary/Makefile
@@ -107,7 +107,7 @@ transpile_implementation:
 		--unicode-char:false \
 		--function-syntax:3 \
 		--output $(OUT) \
-		$(if $(USE_DAFNY_STANDARD_LIBRARIES), bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ) \
+		$(if $(USE_DAFNY_STANDARD_LIBRARIES), ./bin/DafnyStandardLibraries-smithy-dafny-subset.doo, ) \
 		$(DAFNY_OPTIONS) \
 		$(DAFNY_OTHER_FILES) \
 		$(TRANSPILE_MODULE_NAME)
diff --git a/TestModels/dafny-dependencies/StandardLibrary/runtimes/python/src/smithy_dafny_standard_library/internaldafny/extern/streams.py b/TestModels/dafny-dependencies/StandardLibrary/runtimes/python/src/smithy_dafny_standard_library/internaldafny/extern/streams.py
index 7a6eff36b..b2710c8cb 100644
--- a/TestModels/dafny-dependencies/StandardLibrary/runtimes/python/src/smithy_dafny_standard_library/internaldafny/extern/streams.py
+++ b/TestModels/dafny-dependencies/StandardLibrary/runtimes/python/src/smithy_dafny_standard_library/internaldafny/extern/streams.py
@@ -17,8 +17,10 @@ def __init__(self, dafny_byte_stream):
     self.dafny_byte_stream = dafny_byte_stream
 
   def read(self, size: int = -1) -> bytes:
-    # TODO: assert size is -1, buffer, 
-    # or define a more specialized Action<int, bytes> type for streams.
+    # We could define a more specialized Action<int, bytes> type for streams
+    # if we wanted to support this level of control in all languages.
+    if size != -1:
+      raise ValueError(f"A read size other than -1 is not supported: {size}")
     next = self.dafny_byte_stream.Next()
     while next.is_Some and len(next.value) == 0:
       next = self.dafny_byte_stream.Next()
diff --git a/TestModels/dafny-dependencies/dafny b/TestModels/dafny-dependencies/dafny
index 70831a833..46e818a64 160000
--- a/TestModels/dafny-dependencies/dafny
+++ b/TestModels/dafny-dependencies/dafny
@@ -1 +1 @@
-Subproject commit 70831a8332ccbca883ac54b273db26d98cc06e48
+Subproject commit 46e818a64ae289b8d0ddb37249e66ae86b7348d6