diff --git a/latex/book/Makefile b/latex/book/Makefile
index a0ad4da..6ffe6e6 100644
--- a/latex/book/Makefile
+++ b/latex/book/Makefile
@@ -5,6 +5,7 @@ SRC = $(TEX)
 PDF = $(TEX:.tex=.pdf)
 
 TEXMK = latexmk -lualatex -shell-escape -interaction=nonstopmode
+RM    = rm -rf
 
 .PHONY: $(PDF)
 
@@ -15,4 +16,4 @@ $(PDF): %.pdf: %.tex
 
 EXTS = aux fdb_latexmk fls log nav out snm synctex.gz toc bbl blg sta
 clean:
-	rm -rf $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
+	$(RM) $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
diff --git a/latex/document/Makefile b/latex/document/Makefile
index 19fc9c8..61b3509 100644
--- a/latex/document/Makefile
+++ b/latex/document/Makefile
@@ -5,6 +5,7 @@ SRC = $(TEX)
 PDF = $(TEX:.tex=.pdf)
 
 TEXMK = latexmk -lualatex -shell-escape -interaction=nonstopmode
+RM    = rm -rf
 
 all: $(PDF)
 
@@ -13,4 +14,4 @@ $(PDF): %.pdf: %.tex
 
 EXTS = aux fdb_latexmk fls log nav out snm synctex.gz toc
 clean:
-	rm -rf $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
+	$(RM) $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
diff --git a/latex/presentation/Makefile b/latex/presentation/Makefile
index 33d14b0..64c2ae7 100644
--- a/latex/presentation/Makefile
+++ b/latex/presentation/Makefile
@@ -7,6 +7,7 @@ PKG = projektor.sty
 
 TEXMK = latexmk -lualatex -shell-escape -interaction=nonstopmode
 WGET  = wget -q --show-progress
+RM    = rf -rf
 
 
 all: $(PDF)
@@ -20,7 +21,7 @@ endif
 
 EXTS = aux fdb_latexmk fls log nav out snm synctex.gz toc vrb
 clean:
-	rm -rf $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
+	$(RM) $(PDF) _minted-$(NAME)/ $(foreach ext,$(EXTS),$(NAME).$(ext))
 
 updatepackage:
 	@$(WGET) https://git.mylloon.fr/Anri/projektor/raw/branch/main/projektor.sty \