Update Makefile

src/Makefile

@@ -127,14 +127,16 @@ endif
 # Define raylib release directory for compiled library
 RAYLIB_RELEASE_PATH 	?= $(RAYLIB_PATH)/src
 
-ifeq ($(PLATFORM),PLATFORM_WEB)
-    # Emscripten required variables
-    EMSDK_PATH         ?= C:/emsdk
-    EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/upstream/emscripten
-    CLANG_PATH          = $(EMSDK_PATH)/upstream/bin
-    PYTHON_PATH         = $(EMSDK_PATH)/python/3.9.2-1_64bit
-    NODE_PATH           = $(EMSDK_PATH)/node/14.15.5_64bit/bin
-    export PATH         = $(EMSDK_PATH);$(EMSCRIPTEN_PATH);$(CLANG_PATH);$(NODE_PATH);$(PYTHON_PATH):$$(PATH)
+ifeq ($(OS),Windows_NT)
+    ifeq ($(PLATFORM),PLATFORM_WEB)
+        # Emscripten required variables
+        EMSDK_PATH         ?= C:/emsdk
+        EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/upstream/emscripten
+        CLANG_PATH          = $(EMSDK_PATH)/upstream/bin
+        PYTHON_PATH         = $(EMSDK_PATH)/python/3.9.2-1_64bit
+        NODE_PATH           = $(EMSDK_PATH)/node/14.15.5_64bit/bin
+        export PATH         = $(EMSDK_PATH);$(EMSCRIPTEN_PATH);$(CLANG_PATH);$(NODE_PATH);$(PYTHON_PATH):$$(PATH)
+    endif
 endif
 
 # Define default C compiler: CC