diff --git a/.github/workflows/ci_egcs.txt b/.github/workflows/ci_egcs.txt
index b6d8fe72..c6357baf 100644
--- a/.github/workflows/ci_egcs.txt
+++ b/.github/workflows/ci_egcs.txt
@@ -4,10 +4,15 @@
 name: Build EGCS libultra
 
 # Build on every branch push, tag push, and pull request change:
-on: [push, pull_request_target]
+on:
+  push:
+  pull_request:
 
 jobs:
   build_repo:
+    # This is a *private* build container.
+    container: ghcr.io/decompals/ultralib-build:main
+
     name: Build repo
     runs-on: ubuntu-latest
 
@@ -18,25 +23,17 @@ jobs:
         suffix: [_rom] # [~, _d, _rom]
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-
-    - name: Install package requirements
-      run: sudo apt-get install -y build-essential python3
-
-    - name: Get extra dependencies
-      uses: actions/checkout@v3
-      with:
-        repository: ${{ secrets.SECRETREPO }}
-        token: ${{ secrets.SECRETTOKEN }}
-        path: deps_repo
-    - name: Get the dependency
-      run: cp deps_repo/libultra/${{ matrix.version }}/* .
-
-    - name: Setup
-      run: make setup -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
-
-    - name: Build libultra${{ matrix.suffix }} ${{ matrix.version }}
-      run: make -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Install package requirements
+        run: apt-get install -y build-essential python3
+
+      - name: Get the dependency
+        run: cp /orig/${{ matrix.version }}/* base/${{ matrix.version }}
+
+      - name: Setup
+        run: make setup -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+
+      - name: Build libultra${{ matrix.suffix }} ${{ matrix.version }}
+        run: make -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
diff --git a/.github/workflows/ci_gcc.yml b/.github/workflows/ci_gcc.yml
index 8b27d568..dd1cc165 100644
--- a/.github/workflows/ci_gcc.yml
+++ b/.github/workflows/ci_gcc.yml
@@ -3,10 +3,15 @@
 name: Build GCC libgultra
 
 # Build on every branch push, tag push, and pull request change:
-on: [push, pull_request_target]
+on:
+  push:
+  pull_request:
 
 jobs:
   build_repo:
+    # This is a *private* build container.
+    container: ghcr.io/decompals/ultralib-build:main
+
     name: Build repo
     runs-on: ubuntu-latest
 
@@ -17,25 +22,17 @@ jobs:
         suffix: [~, _d, _rom]
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-
-    - name: Install package requirements
-      run: sudo apt-get install -y binutils-mips-linux-gnu build-essential python3
-
-    - name: Get extra dependencies
-      uses: actions/checkout@v3
-      with:
-        repository: ${{ secrets.SECRETREPO }}
-        token: ${{ secrets.SECRETTOKEN }}
-        path: deps_repo
-    - name: Get the dependency
-      run: cp deps_repo/libultra/${{ matrix.version }}/* base/${{ matrix.version }}
-
-    - name: Setup
-      run: make setup -j $(nproc) TARGET=libgultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
-
-    - name: Build libgultra${{ matrix.suffix }} ${{ matrix.version }}
-      run: make -j $(nproc) TARGET=libgultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Install package requirements
+        run: apt-get install -y binutils-mips-linux-gnu build-essential python3
+
+      - name: Get the dependency
+        run: cp /orig/${{ matrix.version }}/* base/${{ matrix.version }}
+
+      - name: Setup
+        run: make setup -j $(nproc) TARGET=libgultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+
+      - name: Build libgultra${{ matrix.suffix }} ${{ matrix.version }}
+        run: make -j $(nproc) TARGET=libgultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
diff --git a/.github/workflows/ci_ido.yml b/.github/workflows/ci_ido.yml
index 14101081..9651143b 100644
--- a/.github/workflows/ci_ido.yml
+++ b/.github/workflows/ci_ido.yml
@@ -3,10 +3,15 @@
 name: Build IDO libultra
 
 # Build on every branch push, tag push, and pull request change:
-on: [push, pull_request_target]
+on:
+  push:
+  pull_request:
 
 jobs:
   build_repo:
+    # This is a *private* build container.
+    container: ghcr.io/decompals/ultralib-build:main
+
     name: Build repo
     runs-on: ubuntu-latest
 
@@ -17,25 +22,17 @@ jobs:
         suffix: [~, _rom] # [~, _d, _rom]
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-
-    - name: Install package requirements
-      run: sudo apt-get install -y build-essential python3 binutils-mips-linux-gnu
-
-    - name: Get extra dependencies
-      uses: actions/checkout@v3
-      with:
-        repository: ${{ secrets.SECRETREPO }}
-        token: ${{ secrets.SECRETTOKEN }}
-        path: deps_repo
-    - name: Get the dependency
-      run: cp deps_repo/libultra/${{ matrix.version }}/* base/${{ matrix.version }}
-
-    - name: Setup
-      run: make setup -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
-
-    - name: Build libultra${{ matrix.suffix }} ${{ matrix.version }}
-      run: make -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Install package requirements
+        run: apt-get install -y build-essential python3 binutils-mips-linux-gnu
+
+      - name: Get the dependency
+        run: cp /orig/${{ matrix.version }}/* base/${{ matrix.version }}
+
+      - name: Setup
+        run: make setup -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
+
+      - name: Build libultra${{ matrix.suffix }} ${{ matrix.version }}
+        run: make -j $(nproc) TARGET=libultra${{ matrix.suffix }} VERSION=${{ matrix.version }}
diff --git a/README.md b/README.md
index 8128718a..02dcd645 100644
--- a/README.md
+++ b/README.md
@@ -32,12 +32,13 @@ The build process requires the following packages:
 - build-essential
 - python3
 - binutils-mips-linux-gnu (libultra* only)
+- wget
 
-Under Debian / Ubunutu you can install them with the following commands:
+Under Debian / Ubuntu you can install them with the following commands:
 
 ```bash
 sudo apt update
-sudo apt install build-essential python3
+sudo apt install build-essential python3 wget
 ```
 
 If building any libultra you can install binutils-mips-linux-gnu with:
@@ -49,7 +50,7 @@ sudo apt install binutils-mips-linux-gnu
 ## Building
 
 Run make setup with the proper flags set followed by make with optional jobs.
-For example, if building the 2.0L PC archive you'd do the following: 
+For example, if building the 2.0L PC archive you'd do the following:
 
 - `make VERSION=L TARGET=libgultra_rom setup`
 - `make VERSION=L TARGET=libgultra_rom`
diff --git a/src/error/kmcprintf.c b/src/error/kmcprintf.c
index 2f4f08e8..830ac724 100644
--- a/src/error/kmcprintf.c
+++ b/src/error/kmcprintf.c
@@ -6,6 +6,8 @@
 #include "ultraerror.h"
 #include "../libc/xstdio.h"
 
+#ifndef _FINALROM
+
 extern u32 __kmc_pt_mode;
 
 static void* proutSyncPrintf(void* str, const char* buf, size_t n) {
@@ -244,3 +246,5 @@ static void kmcErrorHandler(s16 code, s16 numArgs, ...) {
 
     va_end(ap);
 }
+
+#endif
diff --git a/tools/Makefile b/tools/Makefile
index cf0d35e6..d96bb277 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,6 +1,15 @@
 
 .PHONY: all clean distclean
 
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Darwin)
+	GNU_SUFFIX := mac
+	IDO_SUFFIX := macos
+else
+	GNU_SUFFIX := linux
+	IDO_SUFFIX := linux
+endif
+
 # GCC
 GCC_DIR   := gcc
 AR        := $(GCC_DIR)/ar
@@ -14,14 +23,14 @@ IDO-5.3   := $(IDO_DIR)/cc
 all: $(AR) $(GCC-2.7.2) $(STRIP-2.7) $(IDO-5.3)
 
 $(AR): | $(GCC_DIR)
-	wget https://github.com/decompals/mips-binutils-2.6/releases/download/main/binutils-2.6-linux.tar.gz
-	tar xf binutils-2.6-linux.tar.gz -C $(GCC_DIR)
-	$(RM) binutils-2.6-linux.tar.gz
+	wget https://github.com/decompals/mips-binutils-2.6/releases/download/main/binutils-2.6-$(GNU_SUFFIX).tar.gz
+	tar xf binutils-2.6-$(GNU_SUFFIX).tar.gz -C $(GCC_DIR)
+	$(RM) binutils-2.6-$(GNU_SUFFIX).tar.gz
 
 $(GCC-2.7.2): | $(GCC_DIR)
-	wget https://github.com/decompals/mips-gcc-2.7.2/releases/download/main/gcc-2.7.2-linux.tar.gz
-	tar xf gcc-2.7.2-linux.tar.gz -C $(GCC_DIR)
-	$(RM) gcc-2.7.2-linux.tar.gz
+	wget https://github.com/decompals/mips-gcc-2.7.2/releases/download/main/gcc-2.7.2-$(GNU_SUFFIX).tar.gz
+	tar xf gcc-2.7.2-$(GNU_SUFFIX).tar.gz -C $(GCC_DIR)
+	$(RM) gcc-2.7.2-$(GNU_SUFFIX).tar.gz
 
 $(STRIP-2.7): | $(GCC_DIR)
 	wget https://github.com/decompals/mips-binutils-2.7/releases/download/release/binutils-2.7.tar.gz
@@ -32,9 +41,9 @@ $(GCC_DIR):
 	mkdir -p $@
 
 $(IDO-5.3): | $(IDO_DIR)
-	wget https://github.com/decompals/ido-static-recomp/releases/latest/download/ido-5.3-recomp-linux.tar.gz
-	tar xf ido-5.3-recomp-linux.tar.gz -C $(IDO_DIR)
-	$(RM) ido-5.3-recomp-linux.tar.gz
+	wget https://github.com/decompals/ido-static-recomp/releases/latest/download/ido-5.3-recomp-$(IDO_SUFFIX).tar.gz
+	tar xf ido-5.3-recomp-$(IDO_SUFFIX).tar.gz -C $(IDO_DIR)
+	$(RM) ido-5.3-recomp-$(IDO_SUFFIX).tar.gz
 
 $(IDO_DIR):
 	mkdir -p $@