diff --git a/samples/vboxwrapper/Makefile b/samples/vboxwrapper/Makefile
index 470d463f89..4b72668206 100644
--- a/samples/vboxwrapper/Makefile
+++ b/samples/vboxwrapper/Makefile
@@ -1,5 +1,7 @@
 # This should work on Linux.  Modify as needed for other platforms.
 
+VBOXWRAPPER_RELEASE = 26207_x86_64-pc-linux-gnu
+
 # Change the following to match your installation
 BOINC_DIR = ../..
 BOINC_SOURCE_API_DIR = $(BOINC_DIR)/api
@@ -31,7 +33,7 @@ CXXFLAGS += -g \
     -L$(BOINC_LIB_DIR) \
     -L.
 
-PROGS = vboxwrapper
+PROGS = vboxwrapper_$(VBOXWRAPPER_RELEASE)
 
 HEADERS = vbox_common.h vboxjob.h vbox_vboxmanage.h vboxwrapper.h
 
@@ -66,5 +68,5 @@ vboxlogging.o: vboxlogging.cpp $(HEADERS)
 vboxwrapper.o: vboxwrapper.cpp $(HEADERS)
 	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c vboxwrapper.cpp
 
-vboxwrapper: vboxwrapper.o vbox_common.o vbox_vboxmanage.o vboxcheckpoint.o vboxjob.o vboxlogging.o floppyio.o $(MAKEFILE_STDLIB) $(BOINC_LIB_DIR)/libboinc.a $(BOINC_API_DIR)/libboinc_api.a
-	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) -o vboxwrapper vboxwrapper.o vbox_common.o vbox_vboxmanage.o vboxcheckpoint.o vboxjob.o vboxlogging.o floppyio.o $(MAKEFILE_LDFLAGS) -lboinc_api -lboinc $(STDCPPTC)
+vboxwrapper_$(VBOXWRAPPER_RELEASE): vboxwrapper.o vbox_common.o vbox_vboxmanage.o vboxcheckpoint.o vboxjob.o vboxlogging.o floppyio.o $(MAKEFILE_STDLIB) $(BOINC_LIB_DIR)/libboinc.a $(BOINC_API_DIR)/libboinc_api.a
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) -o vboxwrapper_$(VBOXWRAPPER_RELEASE) vboxwrapper.o vbox_common.o vbox_vboxmanage.o vboxcheckpoint.o vboxjob.o vboxlogging.o floppyio.o $(MAKEFILE_LDFLAGS) -lboinc_api -lboinc $(STDCPPTC)
diff --git a/samples/worker/Makefile b/samples/worker/Makefile
index 2c849c71db..942373cba3 100644
--- a/samples/worker/Makefile
+++ b/samples/worker/Makefile
@@ -1,7 +1,9 @@
 CXXFLAGS += -g
 CXX ?= g++
 
-PROGS = worker
+WORKER_RELEASE = 1_x86_64-pc-linux-gnu
+
+PROGS = worker_$(WORKER_RELEASE)
 
 all: $(PROGS)
 
@@ -10,8 +12,8 @@ clean: distclean
 distclean:
 	rm -f $(PROGS) $(addsuffix .exe, $(PROGS)) *.o
 
-worker: worker.o
-	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) -o worker worker.o
+worker_$(WORKER_RELEASE): worker.o
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) -o worker_$(WORKER_RELEASE) worker.o
 
 install: all
 
diff --git a/samples/worker/worker.cpp b/samples/worker/worker.cpp
index 65030763f8..a699c69f28 100644
--- a/samples/worker/worker.cpp
+++ b/samples/worker/worker.cpp
@@ -16,20 +16,22 @@
 // along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
 
 // worker - application without BOINC runtime system;
-// used for testing wrapper.
+// used for testing wrappers.
 //
-// worker [--std_copy] [--file_copy] nsecs
+// worker [--std] [--file] nsecs
 //
-// --std_copy: copy one line of stdin to stdout
-// --file_copy: copy one line of "in" to "out"
+// --std: stdin to stdout
+// --file_copy: "in" to "out"
+// In both cases, convert to uppercase
 // nsecs: use this much CPU time (default 10 sec)
 //
-// THIS PROGRAM SHOULDN'T USE ANY BOINC CODE.  That's the whole point.
+// THIS PROGRAM CAN'T USE ANY BOINC CODE.  That's the whole point.
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>
+#include <ctype.h>
 
 // do a billion floating-point ops
 // (note: I needed to add an arg to this;
@@ -46,25 +48,34 @@ static double do_a_giga_flop(int foo) {
     return x;
 }
 
+void copy_uc(FILE* fin, FILE* fout) {
+    int c;
+    while (1) {
+        c = fgetc(fin);
+        if (c == EOF) break;
+        fputc(toupper(c), fout);
+    }
+}
+
 int main(int argc, char** argv) {
-    char buf[256];
     FILE* in, *out;
     int i, nsec = 10;
-    bool std_copy = false, file_copy = false;
+    bool std = false, file = false;
+    char c;
 
     for (i=1; i<argc; i++) {
-        if (!strcmp(argv[i], "--std_copy")) {
-            std_copy = true;
+        if (!strcmp(argv[i], "--std")) {
+            std = true;
         }
-        if (!strcmp(argv[i], "--file_copy")) {
-            file_copy = true;
+        if (!strcmp(argv[i], "--file")) {
+            file = true;
         }
         nsec = atoi(argv[i]);
     }
 
-    fprintf(stderr, "worker starting\n");
+    fprintf(stderr, "worker: starting\n");
 
-    if (file_copy) {
+    if (file) {
         in = fopen("in", "r");
         if (!in) {
             fprintf(stderr, "missing input file\n");
@@ -75,13 +86,11 @@ int main(int argc, char** argv) {
             fprintf(stderr, "can't open output file\n");
             exit(1);
         }
-        fgets(buf, 256, in);
-        fputs(buf, out);
+        copy_uc(in, out);
     }
 
-    if (std_copy) {
-        fgets(buf, 256, stdin);
-        fputs(buf, stdout);
+    if (std) {
+        copy_uc(stdin, stdout);
     }
 
     int start = (int)time(0);
@@ -91,7 +100,7 @@ int main(int argc, char** argv) {
         do_a_giga_flop(i++);
     }
 
-    fputs("done!\n", stdout);
+    fprintf(stderr, "worker: done\n");
     return 0;
 }
 
diff --git a/samples/wrapper/Makefile b/samples/wrapper/Makefile
index 562a315812..a80682b809 100644
--- a/samples/wrapper/Makefile
+++ b/samples/wrapper/Makefile
@@ -1,5 +1,7 @@
 # This should work on Linux.  Modify as needed for other platforms.
 
+WRAPPER_RELEASE = 26018_x86_64-pc-linux-gnu
+
 # Change the following to match your installation
 BOINC_DIR = ../..
 BOINC_SOURCE_API_DIR = $(BOINC_DIR)/api
@@ -33,7 +35,7 @@ CXXFLAGS += -g -O0 \
     -L$(BOINC_ZIP_DIR) \
     -L.
 
-PROGS = wrapper
+PROGS = wrapper_$(WRAPPER_RELEASE)
 
 all: $(PROGS)
 
@@ -56,5 +58,5 @@ REGEXP_OBJS = \
 	regexp_memory.o \
 	regexp_report.o
 
-wrapper: wrapper.o $(MAKEFILE_STDLIB) $(BOINC_LIB_DIR)/libboinc.a $(BOINC_API_DIR)/libboinc_api.a $(REGEXP_OBJS)
-	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) $(MINGW_WRAPPER_FLAGS) -o wrapper wrapper.o $(REGEXP_OBJS) $(MAKEFILE_LDFLAGS) $(MINGW_ZIP_FIX) -lboinc_api -lboinc -lboinc_zip $(MINGW_LIBS) $(STDCPPTC)
+wrapper_$(WRAPPER_RELEASE): wrapper.o $(MAKEFILE_STDLIB) $(BOINC_LIB_DIR)/libboinc.a $(BOINC_API_DIR)/libboinc_api.a $(REGEXP_OBJS)
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) $(MINGW_WRAPPER_FLAGS) -o wrapper_$(WRAPPER_RELEASE) wrapper.o $(REGEXP_OBJS) $(MAKEFILE_LDFLAGS) $(MINGW_ZIP_FIX) -lboinc_api -lboinc -lboinc_zip $(MINGW_LIBS) $(STDCPPTC)
diff --git a/version.h b/version.h
index 22c1aa8cbe..f38ca41a6c 100644
--- a/version.h
+++ b/version.h
@@ -12,11 +12,17 @@
 /* Release part of BOINC version number */
 #define BOINC_RELEASE 0
 
-/* Release part of wrapper version number */
+// Release part of wrapper version number; must match
+// samples/wrapper/Makefile
+// win_build/wrapper.vcxproj
+// mac?
 #define WRAPPER_RELEASE 26018
 
-/* Release part of vboxwrapper version number */
-#define VBOXWRAPPER_RELEASE 26206
+// Release part of vboxwrapper version number; must match
+// samples/vboxwrapper/Makefile
+// win_build/vboxwrapper.vcxproj
+// mac?
+#define VBOXWRAPPER_RELEASE 26207
 
 /* String representation of BOINC version number */
 #define BOINC_VERSION_STRING "7.25.0"