diff --git a/webapp/Makefile b/webapp/Makefile
index 9c5928897d..da56ad1c1f 100644
--- a/webapp/Makefile
+++ b/webapp/Makefile
@@ -8,7 +8,12 @@ CI ?= false
 # please see optipng-bin Linux arm64 support issue (https://github.com/imagemin/optipng-bin/issues/118) for details:
 ifeq ($(shell uname)/$(shell uname -m),Linux/aarch64)
   LINUX_ARM64 = true
-  CPPFLAGS = "-DPNG_ARM_NEON_OPT=0"
+  CPPFLAGS += " -DPNG_ARM_NEON_OPT=0"
+endif
+# Exact same issue but for Linux/PPC64
+ifeq ($(findstring Linux/ppc64,$(shell uname)/$(shell uname -m)),Linux/ppc64)
+  LINUX_PPC64 = true
+  CPPFLAGS += " -DPNG_POWERPC_VSX_OPT=0"
 endif
 
 .PHONY: run
@@ -68,7 +73,7 @@ node_modules: package.json $(wildcard package-lock.json)
 	@echo Getting dependencies using npm
 
 ifeq ($(CI),false)
-	CPPFLAGS=$(CPPFLAGS) npm install
+	CPPFLAGS="$(CPPFLAGS)" npm install
 else
 	# This runs in CI with NODE_ENV=production which skips devDependencies without this flag
 	npm ci --include=dev