diff --git a/Makefile.in b/Makefile.in
index 5e2059242e2..c2a562967d6 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -410,6 +410,7 @@ export CFG_SRC_DIR
 export CFG_BUILD_DIR
 export CFG_VERSION
 export CFG_VERSION_WIN
+export CFG_RELEASE
 export CFG_BUILD
 export CFG_LLVM_ROOT
 export CFG_ENABLE_MINGW_CROSS
diff --git a/src/etc/pkg/rust.iss b/src/etc/pkg/rust.iss
index 0375a041a39..1c46055fff7 100644
--- a/src/etc/pkg/rust.iss
+++ b/src/etc/pkg/rust.iss
@@ -1,5 +1,6 @@
 #define CFG_VERSION GetEnv("CFG_VERSION")
 #define CFG_VERSION_WIN GetEnv("CFG_VERSION_WIN")
+#define CFG_RELEASE GetEnv("CFG_RELEASE")
 
 [Setup]
 
@@ -19,7 +20,7 @@ DisableStartupPrompt=true
 
 OutputDir=.\
 SourceDir=.\
-OutputBaseFilename=rust-{#CFG_VERSION}-install
+OutputBaseFilename=rust-{#CFG_RELEASE}-install
 DefaultDirName={pf32}\Rust
 
 Compression=lzma2/ultra