diff --git a/Makefile b/Makefile
index 89242c264..1728d7c3f 100644
--- a/Makefile
+++ b/Makefile
@@ -64,9 +64,9 @@ deps: $(BUILD_DEPS)
 
 ## ldflags -s -w strips binary
 
+curio: GOENVS ?= GOAMD64=v3
 curio: $(BUILD_DEPS)
-	rm -f curio
-	GOAMD64=v3 CGO_LDFLAGS_ALLOW=$(CGO_LDFLAGS_ALLOW) $(GOCC) build $(GOFLAGS) -o curio -ldflags " -s -w \
+	$(GOENVS) CGO_LDFLAGS_ALLOW=$(CGO_LDFLAGS_ALLOW) $(GOCC) build $(GOFLAGS) -o curio -ldflags " -s -w \
 	-X github.com/filecoin-project/curio/build.IsOpencl=$(FFI_USE_OPENCL) \
 	-X github.com/filecoin-project/curio/build.CurrentCommit=+git_`git log -1 --format=%h_%cI`" \
 	./cmd/curio
diff --git a/documentation/en/installation.md b/documentation/en/installation.md
index 9b2b31f20..4551024fb 100644
--- a/documentation/en/installation.md
+++ b/documentation/en/installation.md
@@ -159,6 +159,11 @@ git checkout <release version>
        export CGO_CFLAGS="-D__BLST_PORTABLE__"
        ```
 
+    3. Also for old processors, if Curio cannot start because the processor generation is too old, add the variable:\
+
+        ```shell
+        export GOENVS=GOAMD64=v1
+        ```
 
    3.  By default, a ‘multicore-sdr’ option is used in the proofs library. This feature is also used in FFI unless explicitly disabled. To disable building with the ‘multicore-sdr’ dependency, set `FFI_USE_MULTICORE_SDR` to `0`:\