diff --git a/appveyor.yml b/appveyor.yml
index 14bf3907..382d9cf3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,6 +18,7 @@ init:
     - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
 
 install:
+    - set JANET_BUILD=%appveyor_repo_commit:~0,7%
     - choco install nsis -y -pre
     # Replace makensis.exe and files with special long string build. This should
     # prevent issues when setting PATH during installation.
diff --git a/build_win.bat b/build_win.bat
index 054c8a7c..6bda6464 100644
--- a/build_win.bat
+++ b/build_win.bat
@@ -23,36 +23,41 @@
 @set JANET_LINK=link /nologo
 @set JANET_LINK_STATIC=lib /nologo
 
+@rem Add janet build tag
+if not "%JANET_BUILD%" == "" (
+    @set JANET_COMPILE=%JANET_COMPILE% /DJANET_BUILD="\"%JANET_BUILD%\""
+)
+
 mkdir build
 mkdir build\core
 mkdir build\mainclient
 mkdir build\boot
 
 @rem Build the xxd tool for generating sources
-@cl /nologo /c tools/xxd.c /Fobuild\xxd.obj
+cl /nologo /c tools/xxd.c /Fobuild\xxd.obj
 @if errorlevel 1 goto :BUILDFAIL
-@link /nologo /out:build\xxd.exe build\xxd.obj
+link /nologo /out:build\xxd.exe build\xxd.obj
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Generate the embedded sources
-@build\xxd.exe src\mainclient\init.janet build\init.gen.c janet_gen_init
+build\xxd.exe src\mainclient\init.janet build\init.gen.c janet_gen_init
 @if errorlevel 1 goto :BUILDFAIL
-@build\xxd.exe src\boot\boot.janet build\boot.gen.c janet_gen_boot
+build\xxd.exe src\boot\boot.janet build\boot.gen.c janet_gen_boot
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the generated sources
-@%JANET_COMPILE% /Fobuild\mainclient\init.gen.obj build\init.gen.c
+%JANET_COMPILE% /Fobuild\mainclient\init.gen.obj build\init.gen.c
 @if errorlevel 1 goto :BUILDFAIL
-@%JANET_COMPILE% /Fobuild\boot\boot.gen.obj build\boot.gen.c
+%JANET_COMPILE% /Fobuild\boot\boot.gen.obj build\boot.gen.c
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the bootstrap interpreter
 for %%f in (src\core\*.c) do (
-    @%JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
+    %JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 for %%f in (src\boot\*.c) do (
-    @%JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
+    %JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 %JANET_LINK% /out:build\janet_boot.exe build\boot\*.obj
@@ -60,12 +65,12 @@ for %%f in (src\boot\*.c) do (
 build\janet_boot build\core_image.c
 
 @rem Build the core image
-@%JANET_COMPILE% /Fobuild\core_image.obj build\core_image.c
+%JANET_COMPILE% /Fobuild\core_image.obj build\core_image.c
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the sources
 for %%f in (src\core\*.c) do (
-    @%JANET_COMPILE% /Fobuild\core\%%~nf.obj %%f
+    %JANET_COMPILE% /Fobuild\core\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 
@@ -74,7 +79,7 @@ rc /nologo /fobuild\janet_win.res janet_win.rc
 
 @rem Build the main client
 for %%f in (src\mainclient\*.c) do (
-    @%JANET_COMPILE% /Fobuild\mainclient\%%~nf.obj %%f
+    %JANET_COMPILE% /Fobuild\mainclient\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 
diff --git a/janet-installer.nsi b/janet-installer.nsi
index 8719d42a..417222a6 100644
--- a/janet-installer.nsi
+++ b/janet-installer.nsi
@@ -32,7 +32,7 @@ Name "Janet"
 !define DOLLAR "$"
 !ifdef CHECK_${DOLLAR}%APPVEYOR_REPO_TAG_NAME%
     # We are not in the appveyor environment, use version name
-    !define OUTNAME_PART v${VERSION}-nonrelease-
+    !define OUTNAME_PART v${VERSION}
 !else
     # We are in appveyor, use git tag name for installer
     !define OUTNAME_PART ${OUTNAME}